Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already declare a read-only, closed-world operation, and the description adds important behavior beyond that: only the top 20 are returned, there is no pagination or bulk export, and VIP access is required. It still does not describe response fields or error behavior, but the key result-limiting behavior is disclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.