Update app.py

app.py

@@ -16,7 +16,7 @@ def my_custom_tool(arg1:srt, arg2:int)-> str: #it's import to specify the return
         arg1: the first argument
         arg2: the second argument
     """
-
+    return (f'{arg2},{arg1}')
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
     """A tool that fetches the current local time in a specified timezone.