diff --git a/litellm/litellm_core_utils/litellm_logging.py b/litellm/litellm_core_utils/litellm_logging.py
index 51cc568653c..2b808e3aedf 100644
--- a/litellm/litellm_core_utils/litellm_logging.py
+++ b/litellm/litellm_core_utils/litellm_logging.py
@@ -5368,28 +5368,15 @@ def _extract_response_obj_and_hidden_params(
     return response_obj, hidden_params
 
 
-def _extract_mcp_tool_error_message(response_obj: dict) -> Optional[str]:
-    """Return an upstream MCP tool error message when result.isError is true."""
+MCP_TOOL_ERROR_LOGGING_MESSAGE = "MCP tool returned isError=true"
+
+
+def _has_mcp_tool_error(response_obj: dict) -> bool:
+    """Return True when an MCP tool result reports isError."""
     result_obj = response_obj.get("result", response_obj)
     if not isinstance(result_obj, dict) or result_obj.get("isError") is not True:
-        return None
-
-    content = result_obj.get("content")
-    messages: List[str] = []
-    if isinstance(content, list):
-        for item in content:
-            if isinstance(item, dict):
-                text = item.get("text") or item.get("message")
-                if isinstance(text, str) and text.strip():
-                    messages.append(text.strip())
-            elif isinstance(item, str) and item.strip():
-                messages.append(item.strip())
-    elif isinstance(content, str) and content.strip():
-        messages.append(content.strip())
-
-    if messages:
-        return " ".join(messages)
-    return "MCP tool returned isError=true"
+        return False
+    return True
 
 
 def _get_mcp_tool_call_logging_status(
@@ -5406,8 +5393,7 @@ def _get_mcp_tool_call_logging_status(
     if call_type != CallTypes.call_mcp_tool.value:
         return call_type, status, error_str, None
 
-    mcp_tool_error_message = _extract_mcp_tool_error_message(response_obj)
-    if mcp_tool_error_message is None:
+    if _has_mcp_tool_error(response_obj) is False:
         return call_type, status, error_str, None
 
     error_information = StandardLoggingPayloadErrorInformation(
@@ -5415,9 +5401,14 @@ def _get_mcp_tool_call_logging_status(
         error_class="MCPToolError",
         llm_provider="mcp",
         traceback="",
-        error_message=mcp_tool_error_message,
+        error_message=MCP_TOOL_ERROR_LOGGING_MESSAGE,
+    )
+    return (
+        call_type,
+        "failure",
+        error_str or MCP_TOOL_ERROR_LOGGING_MESSAGE,
+        error_information,
     )
-    return call_type, "failure", error_str or mcp_tool_error_message, error_information
 
 
 def get_standard_logging_object_payload(
diff --git a/tests/test_litellm/litellm_core_utils/test_litellm_logging.py b/tests/test_litellm/litellm_core_utils/test_litellm_logging.py
index 717c61c8e68..78e50aadf23 100644
--- a/tests/test_litellm/litellm_core_utils/test_litellm_logging.py
+++ b/tests/test_litellm/litellm_core_utils/test_litellm_logging.py
@@ -2729,12 +2729,12 @@ def test_mcp_tool_is_error_marks_standard_logging_payload_as_failure(logging_obj
     assert payload is not None
     assert payload["status"] == "failure"
     assert payload["status_fields"]["llm_api_status"] == "failure"
-    assert payload["error_str"] == "Input validation error: 'query' is required"
+    assert payload["error_str"] == "MCP tool returned isError=true"
     assert payload["error_information"] is not None
     assert payload["error_information"]["error_class"] == "MCPToolError"
     assert (
         payload["error_information"]["error_message"]
-        == "Input validation error: 'query' is required"
+        == "MCP tool returned isError=true"
     )
     assert payload["metadata"]["mcp_tool_call_metadata"] is not None
     assert (
@@ -2766,7 +2766,7 @@ def test_mcp_tool_json_rpc_is_error_envelope_marks_payload_as_failure(logging_ob
                 "content": [
                     {
                         "type": "text",
-                        "text": "Permission denied for repository",
+                        "text": "Permission denied for repository sk-live-secret",
                     }
                 ],
                 "isError": True,
@@ -2784,8 +2784,11 @@ def test_mcp_tool_json_rpc_is_error_envelope_marks_payload_as_failure(logging_ob
     assert payload["error_information"]["error_class"] == "MCPToolError"
     assert (
         payload["error_information"]["error_message"]
-        == "Permission denied for repository"
+        == "MCP tool returned isError=true"
     )
+    assert payload["error_str"] == "MCP tool returned isError=true"
+    assert "sk-live-secret" not in payload["error_str"]
+    assert "sk-live-secret" not in payload["error_information"]["error_message"]
 
 
 def test_mcp_tool_success_keeps_standard_logging_payload_success(logging_obj):