Update app.py

app.py

@@ -21,6 +21,16 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
 
 @tool
 def calculator(a: int, b: int) -> int:
+    """
+    Performs calculation on two numbers.
+    
+    Args:
+        a: The first number
+        b: The second number
+    
+    Returns:
+        The result of the calculation
+    """
     """Multiply two integers."""
     return a * b