Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds real behavioral context beyond that: the query fallback 'loads the first matching live listing,' which tells the agent the result is a non-deterministic first-match rather than a ranked set. It does not discuss the summary/AI-generation path, though the schema covers that.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.