diff --git a/assets/evaluators/builtin/tool_call_success/evaluator/_tool_call_success.py b/assets/evaluators/builtin/tool_call_success/evaluator/_tool_call_success.py
index b10e2885fe..1260215cd2 100644
--- a/assets/evaluators/builtin/tool_call_success/evaluator/_tool_call_success.py
+++ b/assets/evaluators/builtin/tool_call_success/evaluator/_tool_call_success.py
@@ -1053,9 +1053,10 @@ def _reformat_tool_calls_results(response, logger=None):
             # fallback to the original response in that case
             if logger:
                 logger.warning(
-                    f"Empty agent response extracted, likely due to input schema change. "
-                    f"Falling back to using the original response: {response}"
+                    "Empty agent response extracted, likely due to input schema change. "
+                    "Falling back to using the original response "
                 )
+                logger.debug(f"Original response: {response}")
             return response
         return "\n".join(agent_response)
     except Exception as e: