diff --git a/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py b/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py
index 8ec0a89e77d..1e701c9c0d5 100644
--- a/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py
+++ b/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py
@@ -54,6 +54,7 @@ from litellm.constants import (
 )
 from litellm.integrations.custom_guardrail import (
     CustomGuardrail,
+    guardrail_entry_names,
     guardrail_request_data_with_streaming,
     without_server_streaming_classification,
 )
@@ -886,14 +887,14 @@ async def _inherit_auth_guardrails(
         user_api_key_dict=user_api_key_dict,
     )
     merged: Final = (as_str_mapping(parsed_body["metadata"]) or {}).get("guardrails")
-    if not isinstance(merged, list) or not merged or not _named_guardrail_runs_post_call(parsed_body):
-        return None
-    return _GUARDRAIL_ENTRIES.validate_python(merged)
+    entries: Final = _GUARDRAIL_ENTRIES.validate_python(merged) if isinstance(merged, list) else []
+    return entries if entries and _named_guardrail_runs_post_call(parsed_body, entries) else None
 
 
-def _named_guardrail_runs_post_call(data: Mapping[str, object]) -> bool:
+def _named_guardrail_runs_post_call(data: Mapping[str, object], entries: Sequence[object]) -> bool:
+    names: Final = frozenset(chain.from_iterable(map(guardrail_entry_names, entries)))
     return any(
-        guardrail.default_on is not True
+        guardrail.guardrail_name in names
         and guardrail.should_run_guardrail(  # pyright: ignore[reportUnknownMemberType]  # takes the untyped request dict
             data=data, event_type=GuardrailEventHooks.post_call
         )
diff --git a/tests/unit/proxy/pass_through_endpoints/test_pass_through_endpoints.py b/tests/unit/proxy/pass_through_endpoints/test_pass_through_endpoints.py
index 2f2955d063f..3cac8a87c9f 100644
--- a/tests/unit/proxy/pass_through_endpoints/test_pass_through_endpoints.py
+++ b/tests/unit/proxy/pass_through_endpoints/test_pass_through_endpoints.py
@@ -11861,6 +11861,20 @@ class TestInheritAuthGuardrails:
         post_call.assert_not_awaited()
         assert response.body == b'{\n  "id":"chatcmpl-1"\n}'
 
+    @pytest.mark.asyncio
+    async def test_a_named_default_on_post_call_guardrail_still_checks_the_response(self):
+        auth: Final = UserAPIKeyAuth(api_key="sk-test", metadata={"guardrails": ["global-post"]})
+
+        _, post_call = await self._run(
+            self._chat_body(),
+            inherit=True,
+            user_api_key_dict=auth,
+            guardrails=(self._guardrail("global-post", GuardrailEventHooks.post_call, default_on=True),),
+        )
+
+        post_call.assert_awaited_once()
+        assert post_call.call_args.kwargs["data"]["metadata"]["guardrails"] == ["global-post"]
+
     @pytest.mark.asyncio
     async def test_request_body_guardrails_are_added_to_the_key_guardrails(self):
         auth: Final = UserAPIKeyAuth(api_key="sk-test", metadata={"guardrails": ["key-guard"]})