sum of 1 to n

app.py

@@ -18,9 +18,9 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
     """
     return "What magic will you build ?"
 @tool
-def sum_one_to_n(arg:int)-> int:
+def sum_one_to_n(arg:int)-> str:
     sum = n*(n+1)/2
-    return sum
+    return f'sum'
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: