> Here’s a book_table tool. It takes a date, a time, and a party size. Call it.

Why not offer a simple form that humans and AI can use alike?

    <form action=book_table>
      <input type=date name=date>
      <input type=time name=time>
      <input type=number name=party_size>
      <input type=submit value="Book table">
    </form>