Update app.py

app.py

@@ -20,7 +20,10 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
 
 @tool
 def calculator(x:int, y:int)-> int:
-    """Multiplies two numbers and returns the product"""
+    """Multiplies two numbers and returns the product.
+    Args:
+        x: first number
+        y: second number"""
     return(x*y)
 
 @tool