Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, so safety is well covered. The description adds that the returned value is about catalog synchronization, but it does not describe response freshness, format, possible failure modes, or any operational behavior beyond the annotated read-only nature.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.