Update app.py

app.py

@@ -14,9 +14,9 @@ def calculator(arg1: int, arg2: str, arg3: int) -> int:
     A simple calculator that performs basic arithmetic operations.
 
     Args:
-        arg1 (int): The first number.
-        arg2 (str): The operator ('+', '-', '*','/').
-        arg3 (int): The second number.
+        arg1 (int): The first operand, an integer number.
+        arg2 (str): The operator, which can be '+', '-', '*' or '/'.
+        arg3 (int): The second operand, an integer number.
 
     Returns:
         int: The result of the calculation.
@@ -33,7 +33,7 @@ def calculator(arg1: int, arg2: str, arg3: int) -> int:
     elif arg2 == "/":
         return arg1 / arg3   
     else:
-        raise ValueError("Invalid operator! Only '+', '-' , '/' and '*' are allowed.")
+        raise ValueError("Invalid operator! Only '+', '-' , '*' and '/' are allowed.")
 
 
 @tool