AVA MCP Server

Args:
    recipient_email (str): The email address of the recipient.
    subject (str): The subject line of the email.
    body (str): The main content/body of the email.

Returns:
    dict or None: A dictionary containing the draft information including 'id' and 'message' 
                 if successful, None if an error occurs.

Raises:
    HttpError: If there is an error communicating with the Gmail API.
    
Note:
    This function requires:
    - Gmail API credentials to be properly configured
    - USER_EMAIL environment variable to be set with the sender's email address
    - Appropriate Gmail API permissions for creating drafts