Update app.py

app.py

@@ -33,7 +33,7 @@ def get_current_time_in_timezone(timezone: str) -> str:
     except Exception as e:
         return f"Error fetching time for timezone '{timezone}': {str(e)}"
 
-@tool
+@tool(description="Converts between common units (length, weight, temperature). Useful for unit conversion tasks.")
 def convert_units(value: float, from_unit: str, to_unit: str) -> str:
     """Converts common units (length, weight, temperature).
     Args: