diff --git a/litellm/proxy/agent_endpoints/auth/managed_authorization.py b/litellm/proxy/agent_endpoints/auth/managed_authorization.py
index 0212f2b7032..2195b58750a 100644
--- a/litellm/proxy/agent_endpoints/auth/managed_authorization.py
+++ b/litellm/proxy/agent_endpoints/auth/managed_authorization.py
@@ -208,12 +208,12 @@ _INVOCATION_COST: Final = TypeAdapter(Annotated[float, Field(ge=0, allow_inf_nan
 
 
 def invocation_target(route: str, body: Mapping[str, object]) -> str | None:
-    model: Final = body.get("model")
-    if isinstance(model, str) and model.startswith("a2a/"):
-        return model.removeprefix("a2a/") or None
     components: Final = tuple(route.strip("/").split("/"))
     path: Final = components[1:] if components and components[0] == "v1" else components
-    return path[1] if len(path) >= 2 and path[0] == "a2a" else None
+    if len(path) >= 2 and path[0] == "a2a":
+        return path[1]
+    model: Final = body.get("model")
+    return model.removeprefix("a2a/") or None if isinstance(model, str) and model.startswith("a2a/") else None
 
 
 async def prepare_agent_invocation(
diff --git a/tests/test_litellm/proxy/agent_endpoints/auth/test_managed_authorization.py b/tests/test_litellm/proxy/agent_endpoints/auth/test_managed_authorization.py
index ec352511d50..4d0ae200a4c 100644
--- a/tests/test_litellm/proxy/agent_endpoints/auth/test_managed_authorization.py
+++ b/tests/test_litellm/proxy/agent_endpoints/auth/test_managed_authorization.py
@@ -198,6 +198,8 @@ async def test_agent_history_outage_does_not_permit_legacy_fallback() -> None:
     "route,body,expected",
     [
         ("/a2a/agent", {}, "agent"),
+        ("/a2a/agent", {"model": "a2a/nonexistent"}, "agent"),
+        ("/v1/a2a/agent/message/send", {"model": "a2a/other"}, "agent"),
         ("/v1/a2a/agent/", {}, "agent"),
         ("/v1/chat/completions", {"model": "a2a/Readable name"}, "Readable name"),
         ("/v1/chat/completions", {"model": "a2a/"}, None),