fixing bug missing :

app.py

@@ -20,7 +20,7 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
 
 
 @tool
-def send_email(to_person:str, from_person:str, message:str) -> str
+def send_email(to_person:str, from_person:str, message:str) -> str:
     """ A tool that takes an email address (str) from the to person and sends a message (str) to the from_person"""
     email_str = f"Sending the message {message} from {to_person} to {from_person}"
     return email_str