diff --git a/tests/integration/_support/otlp_sink.py b/tests/integration/_support/otlp_sink.py
index eeabe9d886f..a4d2ea30959 100644
--- a/tests/integration/_support/otlp_sink.py
+++ b/tests/integration/_support/otlp_sink.py
@@ -186,6 +186,7 @@ class _Handler(BaseHTTPRequestHandler):
                 "count": len(recorded),
                 "host": self.headers.get("host", ""),
                 "headers": dict(self.headers),
+                "span_ids": [span["span_id"] for span in recorded],
             }
         )
         self._send_json({"recorded": len(recorded)}, status=self.state.status)
@@ -466,9 +467,7 @@ def _await_sink(url: str) -> None:
 def owned_grpc_sink(directory: Path) -> Iterator[GrpcSink]:
     http_port: Final = _free_port()
     grpc_port: Final = _free_port()
-    with _spawn_sink(
-        directory, "otlp-grpc-sink.log", ["--port", str(http_port), "--grpc-port", str(grpc_port)]
-    ):
+    with _spawn_sink(directory, "otlp-grpc-sink.log", ["--port", str(http_port), "--grpc-port", str(grpc_port)]):
         control_url: Final = f"http://127.0.0.1:{http_port}"
         _await_sink(control_url)
         yield GrpcSink(url=f"http://127.0.0.1:{grpc_port}", control_url=control_url)
diff --git a/tests/integration/observability/test_otel_team_capture_message_content.py b/tests/integration/observability/test_otel_team_capture_message_content.py
new file mode 100644
index 00000000000..a7afc335a1d
--- /dev/null
+++ b/tests/integration/observability/test_otel_team_capture_message_content.py
@@ -0,0 +1,617 @@
+import base64
+import json
+import re
+import uuid
+from collections.abc import Generator, Iterator, Mapping
+from concurrent.futures import ThreadPoolExecutor
+from contextlib import contextmanager
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Final, Literal
+from urllib.parse import urlparse
+
+import httpx
+import pytest
+import yaml
+from integration._support.client import Gateway, Scenario, eventually, gateway_from_environment, object_value
+from integration._support.otlp_sink import Span, SpanSinks, configure_sink, recorded_requests, recorded_spans
+from integration._support.process import OwnedProxy, owned_proxy_process
+from integration._support.wire import Reply, Request, Wire, wire_server
+from pydantic import JsonValue, TypeAdapter
+
+MARKER: Final = re.compile(rb"cmc-(?:tool-|fail-)?[0-9a-f]{32}")
+JSON: Final[TypeAdapter[JsonValue]] = TypeAdapter(JsonValue)
+SERVER: Final = 2
+CALL_ID: Final = "litellm.call_id"
+OPERATION: Final = "gen_ai.operation.name"
+INPUT_TOKENS: Final = "gen_ai.usage.input_tokens"
+Endpoint = Literal["chat", "responses", "messages"]
+Capture = Literal["no_content", "span_only"]
+
+
+def _marker(kind: str = "") -> str:
+    return f"cmc-{kind}{uuid.uuid4().hex}"
+
+
+def _usage() -> dict[str, JsonValue]:
+    return {"prompt_tokens": 7, "completion_tokens": 2, "total_tokens": 9}
+
+
+def _chat_reply(marker: str, stream: bool) -> Reply:
+    identity: Final = f"chatcmpl-{uuid.uuid4().hex}"
+    if marker.startswith("cmc-tool-"):
+        call: Final[dict[str, JsonValue]] = {
+            "id": "call_1",
+            "type": "function",
+            "function": {"name": "lookup", "arguments": json.dumps({"query": marker})},
+        }
+        message: Final[dict[str, JsonValue]] = {"role": "assistant", "content": None, "tool_calls": [call]}
+        return Reply(
+            body=json.dumps(
+                {
+                    "id": identity,
+                    "object": "chat.completion",
+                    "created": 1,
+                    "model": "gpt-4o-mini",
+                    "choices": [{"index": 0, "message": message, "finish_reason": "tool_calls"}],
+                    "usage": _usage(),
+                }
+            ).encode()
+        )
+    if not stream:
+        return Reply(
+            body=json.dumps(
+                {
+                    "id": identity,
+                    "object": "chat.completion",
+                    "created": 1,
+                    "model": "gpt-4o-mini",
+                    "choices": [
+                        {"index": 0, "message": {"role": "assistant", "content": marker}, "finish_reason": "stop"}
+                    ],
+                    "usage": _usage(),
+                }
+            ).encode()
+        )
+    chunk: Final = {"id": identity, "object": "chat.completion.chunk", "created": 1, "model": "gpt-4o-mini"}
+    deltas: Final[tuple[dict[str, JsonValue], ...]] = (
+        {**chunk, "choices": [{"index": 0, "delta": {"role": "assistant", "content": marker}}]},
+        {**chunk, "choices": [{"index": 0, "delta": {}, "finish_reason": "stop"}]},
+        {**chunk, "choices": [], "usage": _usage()},
+    )
+    return Reply(
+        content_type="text/event-stream",
+        chunks=(*(b"data: " + json.dumps(delta).encode() + b"\n\n" for delta in deltas), b"data: [DONE]\n\n"),
+    )
+
+
+def _responses_reply(marker: str, stream: bool) -> Reply:
+    identity: Final = uuid.uuid4().hex
+    response: Final[dict[str, JsonValue]] = {
+        "id": f"resp_{identity}",
+        "object": "response",
+        "created_at": 1,
+        "status": "completed",
+        "model": "gpt-4o-mini",
+        "output": [
+            {
+                "id": f"msg_{identity}",
+                "type": "message",
+                "role": "assistant",
+                "status": "completed",
+                "content": [{"type": "output_text", "text": marker, "annotations": []}],
+            }
+        ],
+        "usage": {"input_tokens": 7, "output_tokens": 2, "total_tokens": 9},
+    }
+    if not stream:
+        return Reply(body=json.dumps(response).encode())
+    events: Final[tuple[dict[str, JsonValue], ...]] = (
+        {
+            "type": "response.created",
+            "sequence_number": 0,
+            "response": {**response, "status": "in_progress", "output": []},
+        },
+        {
+            "type": "response.output_text.delta",
+            "sequence_number": 1,
+            "item_id": f"msg_{identity}",
+            "output_index": 0,
+            "content_index": 0,
+            "delta": marker,
+        },
+        {"type": "response.completed", "sequence_number": 2, "response": response},
+    )
+    return Reply(
+        content_type="text/event-stream",
+        chunks=tuple(f"event: {event['type']}\ndata: {json.dumps(event)}\n\n".encode() for event in events),
+    )
+
+
+def _upstream(request: Request) -> Reply:
+    found: Final = MARKER.search(request.body)
+    if found is None:
+        return Reply(status=404, body=b'{"error":"no marker"}')
+    marker: Final = found.group(0).decode()
+    if marker.startswith("cmc-fail-"):
+        return Reply(status=500, body=b'{"error":{"message":"scripted upstream failure","type":"server_error"}}')
+    stream: Final = object_value(JSON.validate_json(request.body)).get("stream") is True
+    if request.target.endswith("/responses"):
+        return _responses_reply(marker, stream)
+    return _chat_reply(marker, stream)
+
+
+def _body(model: str, endpoint: Endpoint, marker: str, stream: bool) -> tuple[str, dict[str, JsonValue]]:
+    if endpoint == "responses":
+        return "/v1/responses", {"model": model, "input": marker, "stream": stream}
+    messages: Final[list[JsonValue]] = [{"role": "user", "content": marker}]
+    if endpoint == "messages":
+        return "/v1/messages", {"model": model, "max_tokens": 16, "messages": messages, "stream": stream}
+    return "/v1/chat/completions", {"model": model, "messages": messages, "stream": stream}
+
+
+@dataclass(frozen=True, slots=True)
+class Sent:
+    marker: str
+    trace_id: str
+    call_id: str
+    status: int
+    text: str
+
+
+@dataclass(frozen=True, slots=True)
+class Cursors:
+    operator: int
+    tenant: int
+    arize: int
+
+
+@dataclass(frozen=True, slots=True)
+class Rig:
+    proxy: Gateway
+    owned: OwnedProxy
+    scenario: Scenario
+    model: str
+    upstream: Wire
+    sinks: SpanSinks
+
+    def cursors(self) -> Cursors:
+        self.upstream.drain()
+        return Cursors(
+            recorded_spans(self.sinks.operator)[0],
+            recorded_spans(self.sinks.tenant)[0],
+            recorded_spans(self.sinks.arize)[0],
+        )
+
+    def upstream_hits(self, marker: str) -> int:
+        return sum(1 for request in self.upstream.drain() if marker.encode() in request.body)
+
+    def langfuse(self, name: str, host: str | None = None) -> dict[str, str]:
+        return {
+            "langfuse_public_key": f"pk-lf-{name}",
+            "langfuse_secret_key": f"sk-lf-{name}",
+            "langfuse_host": host or self.sinks.tenant,
+        }
+
+    def attach(self, team: str, callback: str, variables: Mapping[str, str], kind: str | None = None) -> httpx.Response:
+        body: Final[dict[str, JsonValue]] = {"callback_name": callback, "callback_vars": dict(variables)}
+        return self.proxy.request(
+            "POST", f"/team/{team}/callback", body if kind is None else {**body, "callback_type": kind}
+        )
+
+    def team_key(
+        self,
+        capture: Capture | None,
+        name: str,
+        *,
+        callback: str = "langfuse_otel",
+        variables: Mapping[str, str] | None = None,
+        kind: str | None = None,
+    ) -> tuple[str, str]:
+        team: Final = self.scenario.team()
+        base: Final = dict(variables) if variables is not None else self.langfuse(name)
+        attached: Final = self.attach(
+            team, callback, base if capture is None else {**base, "capture_message_content": capture}, kind
+        )
+        assert attached.status_code == 200, attached.text
+        return team, self.scenario.key(team_id=team)
+
+    def send(
+        self,
+        key: str,
+        endpoint: Endpoint = "chat",
+        stream: bool = False,
+        *,
+        marker: str | None = None,
+        extra: Mapping[str, JsonValue] | None = None,
+    ) -> Sent:
+        tagged: Final = marker or _marker()
+        path, body = _body(self.model, endpoint, tagged, stream)
+        trace_id: Final = uuid.uuid4().hex
+        call_id: Final = str(uuid.uuid4())
+        headers: Final = {
+            "Authorization": f"Bearer {key}",
+            "traceparent": f"00-{trace_id}-{uuid.uuid4().hex[:16]}-01",
+            "x-litellm-call-id": call_id,
+        }
+        with self.proxy.client.stream("POST", path, json={**body, **(extra or {})}, headers=headers) as response:
+            text: Final = response.read().decode()
+            return Sent(tagged, trace_id, call_id, response.status_code, text)
+
+
+def _served(sent: Sent) -> Sent:
+    assert sent.status == 200, sent.text
+    assert sent.marker in sent.text, sent.text
+    return sent
+
+
+Credential = tuple[str, str]
+
+
+def _sent_with(url: str, credential: Credential) -> frozenset[str]:
+    """Span ids ``url`` received in export requests whose ``credential`` header matched."""
+    header, value = credential
+    return frozenset(
+        span_id
+        for request in recorded_requests(url)
+        if {name.lower(): seen for name, seen in object_value(request.get("headers")).items()}.get(header) == value
+        for span_id in request.get("span_ids") or ()
+        if isinstance(span_id, str)
+    )
+
+
+def _of_request(url: str, since: int, sent: Sent, credential: Credential | None = None) -> tuple[Span, ...]:
+    """Spans of ``sent``'s trace at ``url``, narrowed to one account's export requests when ``credential`` is set."""
+    spans: Final = recorded_spans(url, since)[1]
+    traces: Final = {sent.trace_id} | {
+        span["trace_id"] for span in spans if span["attributes"].get(CALL_ID) == sent.call_id
+    }
+    owned: Final = None if credential is None else _sent_with(url, credential)
+    return tuple(span for span in spans if span["trace_id"] in traces and (owned is None or span["span_id"] in owned))
+
+
+def _carries(span: Span, marker: str) -> bool:
+    return marker in json.dumps(span["attributes"])
+
+
+def _model_spans(spans: tuple[Span, ...]) -> tuple[Span, ...]:
+    return tuple(span for span in spans if OPERATION in span["attributes"])
+
+
+def _names(spans: tuple[Span, ...]) -> list[str]:
+    return sorted(span["name"] for span in spans)
+
+
+def _with_content(url: str, since: int, sent: Sent) -> tuple[Span, ...]:
+    """The copy of ``sent`` at ``url`` once its model span arrived and some span carries the marker."""
+    return eventually(
+        lambda: _of_request(url, since, sent),
+        lambda spans: bool(_model_spans(spans)) and any(_carries(span, sent.marker) for span in spans),
+        seconds=40,
+    )
+
+
+def _arrived(
+    url: str, since: int, sent: Sent, expected: frozenset[str], credential: Credential | None = None
+) -> tuple[Span, ...]:
+    """The copy of ``sent`` at ``url`` once every span name in ``expected`` and a usage-bearing model span landed."""
+    spans: Final = eventually(
+        lambda: _of_request(url, since, sent, credential),
+        lambda found: (
+            expected <= {span["name"] for span in found}
+            and any(INPUT_TOKENS in span["attributes"] for span in _model_spans(found))
+        ),
+        seconds=40,
+    )
+    assert all(
+        span["attributes"].get(INPUT_TOKENS) == 7 for span in _model_spans(spans) if INPUT_TOKENS in span["attributes"]
+    )
+    return spans
+
+
+def _assert_redacted_twin(
+    rig: Rig, sent: Sent, cursors: Cursors, sink: str, since: int, credential: Credential | None = None
+) -> tuple[Span, ...]:
+    operator: Final = _with_content(rig.sinks.operator, cursors.operator, sent)
+    carried: Final = frozenset(span["name"] for span in operator if _carries(span, sent.marker))
+    tenant: Final = _arrived(sink, since, sent, carried, credential)
+    leaked: Final = [span["name"] for span in tenant if _carries(span, sent.marker)]
+    assert leaked == [], f"{leaked} carried content; tenant saw {_names(tenant)}"
+    model: Final = _model_spans(tenant)[0]["attributes"]
+    assert "gen_ai.input.messages" not in model and "gen_ai.output.messages" not in model, sorted(model)
+    assert model.get("gen_ai.request.model"), sorted(model)
+    return tenant
+
+
+def _assert_content_twin(rig: Rig, sent: Sent, cursors: Cursors) -> None:
+    operator: Final = _with_content(rig.sinks.operator, cursors.operator, sent)
+    carried: Final = frozenset(span["name"] for span in operator if _carries(span, sent.marker))
+    tenant: Final = _arrived(rig.sinks.tenant, cursors.tenant, sent, carried)
+    kept: Final = frozenset(span["name"] for span in tenant if _carries(span, sent.marker))
+    assert carried <= kept, f"content lost on {sorted(carried - kept)}"
+
+
+@pytest.mark.parametrize(
+    ("endpoint", "stream"),
+    [("chat", False), ("chat", True), ("responses", False), ("messages", True)],
+    ids=["chat-unary", "chat-stream", "responses-unary", "messages-stream"],
+)
+def test_no_content_team_keeps_its_trace_and_metadata_without_content(
+    rig: Rig, endpoint: Endpoint, stream: bool
+) -> None:
+    _, key = rig.team_key("no_content", "a")
+    cursors: Final = rig.cursors()
+    sent: Final = _served(rig.send(key, endpoint, stream))
+    assert rig.upstream_hits(sent.marker) == 1
+    _assert_redacted_twin(rig, sent, cursors, rig.sinks.tenant, cursors.tenant)
+
+
+@pytest.mark.parametrize("capture", ["span_only", None], ids=["span_only", "omitted"])
+def test_span_only_and_omitted_teams_keep_the_globally_captured_content(rig: Rig, capture: Capture | None) -> None:
+    _, key = rig.team_key(capture, "b")
+    cursors: Final = rig.cursors()
+    sent: Final = _served(rig.send(key))
+    _assert_content_twin(rig, sent, cursors)
+
+
+def test_tool_call_arguments_never_reach_a_no_content_team(rig: Rig) -> None:
+    _, key = rig.team_key("no_content", "a")
+    cursors: Final = rig.cursors()
+    tool: Final[dict[str, JsonValue]] = {
+        "type": "function",
+        "function": {"name": "lookup", "parameters": {"type": "object", "properties": {"query": {"type": "string"}}}},
+    }
+    sent: Final = rig.send(key, marker=_marker("tool-"), extra={"tools": [tool]})
+    assert sent.status == 200 and sent.marker in sent.text, sent.text
+    operator: Final = _with_content(rig.sinks.operator, cursors.operator, sent)
+    assert any(sent.marker in str(span["attributes"].get("gen_ai.output.messages", "")) for span in operator), (
+        "operator copy lacks the tool-call arguments"
+    )
+    tenant: Final = _assert_redacted_twin(rig, sent, cursors, rig.sinks.tenant, cursors.tenant)
+    assert "lookup" in json.dumps([span["attributes"] for span in tenant]), "tool definitions are metadata and stay"
+
+
+def test_cache_hit_twin_of_a_no_content_team_is_redacted(rig: Rig) -> None:
+    _, key = rig.team_key("no_content", "a")
+    marker: Final = _marker()
+    _served(rig.send(key, marker=marker))
+    assert rig.upstream_hits(marker) == 1
+    cursors: Final = rig.cursors()
+    hit: Final = eventually(
+        lambda: _served(rig.send(key, marker=marker)), lambda _: rig.upstream_hits(marker) == 0, seconds=20
+    )
+    operator: Final = eventually(
+        lambda: _of_request(rig.sinks.operator, cursors.operator, hit),
+        lambda spans: any(span["kind"] == SERVER for span in spans),
+        seconds=40,
+    )
+    expected: Final = frozenset(span["name"] for span in operator if span["kind"] == SERVER)
+    tenant: Final = eventually(
+        lambda: _of_request(rig.sinks.tenant, cursors.tenant, hit),
+        lambda spans: expected <= {span["name"] for span in spans},
+        seconds=40,
+    )
+    assert [span["name"] for span in tenant if _carries(span, marker)] == [], _names(tenant)
+
+
+def test_failure_only_entry_routed_with_team_credentials_is_redacted(rig: Rig) -> None:
+    """A failure-only entry gets no fan-out destination, so the team's account is reached by the routed fallback."""
+    _, key = rig.team_key("no_content", "fail", kind="failure")
+    team_account: Final = ("authorization", "Basic " + base64.b64encode(b"pk-lf-fail:sk-lf-fail").decode())
+    cursors: Final = rig.cursors()
+    sent: Final = _served(rig.send(key))
+    routed: Final = _arrived(rig.sinks.operator, cursors.operator, sent, frozenset(), team_account)
+    assert [span["name"] for span in routed if _carries(span, sent.marker)] == [], _names(routed)
+    assert _model_spans(routed)[0]["attributes"].get("gen_ai.request.model"), _names(routed)
+
+
+def test_key_level_logging_with_no_content_is_redacted(rig: Rig) -> None:
+    logging: Final[list[JsonValue]] = [
+        {
+            "callback_name": "langfuse_otel",
+            "callback_type": "success",
+            "callback_vars": {**rig.langfuse("key"), "capture_message_content": "no_content"},
+        }
+    ]
+    key: Final = rig.scenario.key(metadata={"logging": logging})
+    cursors: Final = rig.cursors()
+    sent: Final = _served(rig.send(key))
+    _assert_redacted_twin(rig, sent, cursors, rig.sinks.tenant, cursors.tenant)
+
+
+def test_same_account_destination_redacts_the_shared_copy_only_for_that_team(rig: Rig) -> None:
+    _, restricted = rig.team_key("no_content", "operator", variables=rig.langfuse("operator", host=rig.sinks.operator))
+    _, other = rig.team_key("span_only", "b")
+    cursors: Final = rig.cursors()
+    shared: Final = _served(rig.send(restricted))
+    assert rig.upstream_hits(shared.marker) == 1
+    copy: Final = eventually(
+        lambda: _of_request(rig.sinks.operator, cursors.operator, shared),
+        lambda spans: any(INPUT_TOKENS in span["attributes"] for span in _model_spans(spans)),
+        seconds=40,
+    )
+    assert [span["name"] for span in copy if _carries(span, shared.marker)] == [], _names(copy)
+    assert len([span for span in copy if span["kind"] == SERVER and span["name"].startswith("POST ")]) == 1, _names(
+        copy
+    )
+    _assert_content_twin(rig, _served(rig.send(other)), cursors)
+
+
+def test_arize_destination_drops_openinference_content(rig: Rig) -> None:
+    _, key = rig.team_key(
+        "no_content", "arize", callback="arize", variables={"arize_space_key": "space-a", "arize_api_key": "arize-a"}
+    )
+    cursors: Final = rig.cursors()
+    sent: Final = _served(rig.send(key))
+    operator: Final = _with_content(rig.sinks.operator, cursors.operator, sent)
+    assert any(sent.marker in str(span["attributes"].get("input.value", "")) for span in operator), (
+        "operator copy has no OpenInference content to strip"
+    )
+    tenant: Final = _assert_redacted_twin(
+        rig, sent, cursors, rig.sinks.arize, cursors.arize, ("arize-space-id", "space-a")
+    )
+    model: Final = _model_spans(tenant)[0]["attributes"]
+    assert not any(name.startswith(("llm.input_messages.", "llm.output_messages.")) for name in model), sorted(model)
+    assert "input.value" not in model and "output.value" not in model, sorted(model)
+    assert model.get("llm.model_name"), sorted(model)
+
+
+def test_global_no_content_is_not_lifted_by_a_span_only_team(dark_rig: Rig) -> None:
+    _, key = dark_rig.team_key("span_only", "b")
+    cursors: Final = dark_rig.cursors()
+    sent: Final = _served(dark_rig.send(key))
+    assert dark_rig.upstream_hits(sent.marker) == 1
+    operator: Final = _arrived(dark_rig.sinks.operator, cursors.operator, sent, frozenset())
+    tenant: Final = _arrived(
+        dark_rig.sinks.tenant, cursors.tenant, sent, frozenset(span["name"] for span in _model_spans(operator))
+    )
+    leaked: Final = [span["name"] for span in (*operator, *tenant) if _carries(span, sent.marker)]
+    assert leaked == [], leaked
+
+
+def test_an_unsupported_value_fails_registration(rig: Rig) -> None:
+    team: Final = rig.scenario.team()
+    response: Final = rig.attach(team, "langfuse_otel", {**rig.langfuse("a"), "capture_message_content": "bogus"})
+    assert response.status_code == 422, response.text
+    assert "Invalid capture_message_content 'bogus'" in response.text, response.text
+
+
+def test_classic_langfuse_rejects_the_setting(rig: Rig) -> None:
+    team: Final = rig.scenario.team()
+    response: Final = rig.attach(team, "langfuse", {**rig.langfuse("a"), "capture_message_content": "no_content"})
+    assert response.status_code == 400, response.text
+    assert "capture_message_content" in response.text, response.text
+
+
+def test_a_conflicting_second_entry_is_rejected(rig: Rig) -> None:
+    team, _ = rig.team_key("no_content", "a")
+    response: Final = rig.attach(
+        team,
+        "arize",
+        {"arize_space_key": "space-a", "arize_api_key": "arize-a", "capture_message_content": "span_only"},
+    )
+    assert response.status_code == 400, response.text
+    assert "already set to 'no_content'" in response.text, response.text
+
+
+def test_replacing_the_registration_switches_the_team_to_content(rig: Rig) -> None:
+    team, key = rig.team_key("no_content", "a")
+    cursors: Final = rig.cursors()
+    _assert_redacted_twin(rig, _served(rig.send(key)), cursors, rig.sinks.tenant, cursors.tenant)
+    removed: Final = rig.proxy.request("DELETE", f"/team/{team}/callback/langfuse_otel")
+    assert removed.status_code == 200, removed.text
+    replaced: Final = rig.attach(team, "langfuse_otel", {**rig.langfuse("a"), "capture_message_content": "span_only"})
+    assert replaced.status_code == 200, replaced.text
+
+    def attempt() -> bool:
+        since: Final = rig.cursors()
+        sent: Final = _served(rig.send(key))
+        operator: Final = _with_content(rig.sinks.operator, since.operator, sent)
+        carried: Final = frozenset(span["name"] for span in operator if _carries(span, sent.marker))
+        tenant: Final = _arrived(rig.sinks.tenant, since.tenant, sent, carried)
+        return any(_carries(span, sent.marker) for span in tenant)
+
+    assert eventually(attempt, bool, seconds=60)
+
+
+def test_request_metadata_cannot_lift_the_team_restriction(rig: Rig) -> None:
+    _, key = rig.team_key("no_content", "a")
+    sent: Final = rig.send(key, extra={"metadata": {"capture_message_content": "span_only"}})
+    assert sent.status == 401, sent.text
+    assert "capture_message_content is not allowed in request body" in sent.text, sent.text
+    assert rig.upstream_hits(sent.marker) == 0
+
+
+def test_stalled_tenant_during_a_mixed_burst_keeps_serving_and_each_teams_policy(rig: Rig) -> None:
+    _, restricted = rig.team_key("no_content", "a")
+    _, open_key = rig.team_key("span_only", "b")
+    shapes: Final[tuple[tuple[Endpoint, bool], ...]] = (
+        ("chat", False),
+        ("chat", True),
+        ("responses", False),
+        ("messages", True),
+    )
+    plan: Final = [(restricted if index % 2 else open_key, *shapes[index % len(shapes)]) for index in range(30)]
+    cursors: Final = rig.cursors()
+    configure_sink(rig.sinks.tenant, paused=True)
+    try:
+        with ThreadPoolExecutor(max_workers=10) as pool:
+            sent: Final = list(pool.map(lambda job: rig.send(job[0], job[1], job[2]), plan))
+    finally:
+        configure_sink(rig.sinks.tenant, paused=False)
+    assert [result.status for result in sent] == [200] * 30, [result.text for result in sent if result.status != 200]
+    for (key, _, _), result in zip(plan, sent, strict=True):
+        roots = [
+            span
+            for span in _with_content(rig.sinks.operator, cursors.operator, result)
+            if span["kind"] == SERVER and span["name"].startswith("POST ")
+        ]
+        assert len(roots) == 1, roots
+        if key == restricted:
+            _assert_redacted_twin(rig, result, cursors, rig.sinks.tenant, cursors.tenant)
+        else:
+            _assert_content_twin(rig, result, cursors)
+
+
+def _write_config(directory: Path, sinks: SpanSinks, name: str) -> Path:
+    config: Final = yaml.safe_load(Path("tests/integration/proxy_config.yaml").read_text())
+    config["litellm_settings"] = {
+        **config.get("litellm_settings", {}),
+        "callbacks": ["langfuse_otel"],
+        "otel_tenant_destination_mode": "additive",
+        "provider_url_destination_allowed_hosts": [urlparse(sinks.tenant).netloc, urlparse(sinks.operator).netloc],
+    }
+    config["general_settings"] = {**config.get("general_settings", {}), "user_api_key_cache_ttl": 2}
+    path: Final = directory / f"{name}.yaml"
+    path.write_text(yaml.safe_dump(config))
+    return path
+
+
+@contextmanager
+def _started(provider: Wire, sinks: SpanSinks, directory: Path, capture: str | None) -> Generator[Rig]:
+    environment: Final = {
+        "LITELLM_OTEL_V2": "1",
+        "OTEL_BSP_SCHEDULE_DELAY": "300",
+        "MAPPER_NAMES": "genai,openinference",
+        "LANGFUSE_HOST": sinks.operator,
+        "LANGFUSE_PUBLIC_KEY": "pk-lf-operator",
+        "LANGFUSE_SECRET_KEY": "sk-lf-operator",
+        "ARIZE_SPACE_KEY": "space-operator",
+        "ARIZE_API_KEY": "arize-operator",
+        "ARIZE_HTTP_ENDPOINT": sinks.arize + "/v1/traces",
+        **({} if capture is None else {"OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT": capture}),
+    }
+    with (
+        gateway_from_environment() as gateway,
+        owned_proxy_process(
+            gateway,
+            directory,
+            environment,
+            config=_write_config(directory, sinks, "capture"),
+            remove_environment=(
+                "OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT",
+                "LITELLM_OTEL_TENANT_DESTINATION_MODE",
+            ),
+            workers=2,
+        ) as owned,
+        owned.gateway.scenario() as scenario,
+    ):
+        yield Rig(owned.gateway, owned, scenario, scenario.model(api_base=provider.url + "/v1"), provider, sinks)
+
+
+@pytest.fixture(scope="module")
+def provider() -> Iterator[Wire]:
+    with wire_server(_upstream) as wire:
+        yield wire
+
+
+@pytest.fixture(scope="module")
+def rig(provider: Wire, audit_sinks: SpanSinks, tmp_path_factory: pytest.TempPathFactory) -> Iterator[Rig]:
+    with _started(provider, audit_sinks, tmp_path_factory.mktemp("capture-span-only"), "span_only") as started:
+        yield started
+
+
+@pytest.fixture(scope="module")
+def dark_rig(provider: Wire, audit_sinks: SpanSinks, tmp_path_factory: pytest.TempPathFactory) -> Iterator[Rig]:
+    with _started(provider, audit_sinks, tmp_path_factory.mktemp("capture-no-content"), None) as started:
+        yield started