Update app.py

app.py

@@ -17,7 +17,7 @@ def get_random_word(letter: str)-> str: #it's import to specify the return type
     #Keep this format for the description / args / args description but feel free to modify the tool
     """A tool that does gives you a random word starting with a specified letter 
     Args:
-        arg1: the first letter for the random word
+        letter: A string containing the first letter for the random word
     """
     letter_list = filter(str.startswith(letter), WORDS)
     random_word = random.choice(letter_list)