Africa's Talking Airtime MCP

This tool connects to the Africa's Talking API to fetch the user's
current application data, which includes the account balance.

Returns:
    str: A message displaying the account balance or an error if the
         balance cannot be retrieved.

This tool formats the phone number, sends the airtime using the
Africa's Talking API, and saves a record of the transaction in the
database.

Args:
    phone_number (str): The recipient's phone number.
    amount (float): The amount of airtime to send.
    currency_code (str): The currency for the transaction (e.g., "KES").

Returns:
    str: A message indicating the status of the airtime transaction.

Args:
    limit (int, optional): The number of recent transactions to fetch.
                           Defaults to 3.

Returns:
    str: A formatted string listing the last N transactions or a message
         if no transactions are found.

This tool retrieves the last 'n' transactions from the database and
calculates their total sum. It ensures that all transactions are in the
same currency before summing.

Args:
    n (int, optional): The number of recent top-ups to sum. Defaults to 3.

Returns:
    str: The total sum of the last 'n' top-ups or an error message if
         the currencies are mixed or no transactions are found.

Args:
    phone_number (str): The phone number to count transactions for.

Returns:
    str: The total count of top-ups for the given number or an error message.