Update app.py

app.py

@@ -20,7 +20,10 @@ def get_current_time_in_timezone(timezone: str) -> str:
 
 @tool
 def final_answer(answer: str) -> str:
-    """Returns the final answer."""
+    """Returns the final answer.
+    Args:
+        answer: The final answer to return as a string.
+    """
     return answer
 
 model = HfApiModel(