Update app.py

app.py

@@ -17,10 +17,10 @@ def calculate(arg1:int, arg2:int)-> str: #it's import to specify the return type
         arg2 (int): The second integer number.
 
     Returns:
-        str: The sum of arg1 and arg2 as a number.
+        str: The sum of arg1 and arg2 as a string.
     """
     
-    return (arg1+arg2+1)
+    return str(arg1+arg2)
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
     """A tool that fetches the current local time in a specified timezone.