diff --git a/litellm/integrations/custom_logger.py b/litellm/integrations/custom_logger.py
index f5dcb37407f..22b4376101f 100644
--- a/litellm/integrations/custom_logger.py
+++ b/litellm/integrations/custom_logger.py
@@ -860,7 +860,7 @@ class CustomLogger:  # https://docs.litellm.ai/docs/observability/custom_callbac
             if "messages" not in (excluded_fields or []) and standard_logging_object_copy.get("messages") is not None:
                 standard_logging_object_copy["messages"] = [Message(content=redacted_str).model_dump()]
 
-            if "metadata" not in (excluded_fields or []):
+            if not excluded_fields or "metadata" not in excluded_fields:
                 metadata: Final = standard_logging_object_copy.get("metadata")
                 redacted_metadata: Final = redacted_mcp_tool_call_metadata(metadata, redacted_str)
                 if redacted_metadata is not metadata:
diff --git a/litellm/litellm_core_utils/redact_messages.py b/litellm/litellm_core_utils/redact_messages.py
index 508ec408a59..9d2dd85164f 100644
--- a/litellm/litellm_core_utils/redact_messages.py
+++ b/litellm/litellm_core_utils/redact_messages.py
@@ -171,8 +171,8 @@ def redacted_mcp_tool_call_metadata(metadata: object, redacted_str: str) -> obje
         return metadata
 
     redacted_call: Final = {
-        **mcp_tool_call,
-        **{key: redacted_str for key in ("arguments", "result") if mcp_tool_call.get(key) is not None},
+        key: (redacted_str if key in ("arguments", "result") and value is not None else value)
+        for key, value in mcp_tool_call.items()
     }
     return {**metadata, "mcp_tool_call_metadata": redacted_call}