Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description mentions '(read-only)', indicating no destructive side effects, which is useful. However, it does not disclose other behaviors such as pagination, authentication requirements, rate limits, or error handling. With no annotations, the description carries the full burden but remains minimal.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.