Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the entire behavioral burden. It does not say whether a Courseweb session/cookie is required (siblings set_session_cookie and interactive_login suggest authentication is a real concern), how far ahead 'upcoming' reaches, whether results span all courses, or how they are ordered, so an agent cannot predict the call's behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.