Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description carries the full burden. It states it gets 'all appointments' but does not disclose pagination, ordering, whether past/future appointments are included, or the response format. The read-only nature is implied by 'get' but not explicitly confirmed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.