Update app.py

app.py

@@ -15,8 +15,8 @@ def reverse_string(arg1:str)-> str: #it's import to specify the return type
     Args:
         arg1: string to be reversed
     """
-    arg1 = arg1[::-1]
-    return arg1
+
+    return arg1[::-1]
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: