Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden. It discloses behavioral traits like optional access_token caching, default limit, and output format. However, it does not mention rate limits or side effects, but for a read-only tool it is fairly transparent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.