Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish this as a safe, read-only, idempotent, non-destructive read, so the safety burden is lifted. The description adds real behavioral context on top: null means 'no answers or no data yet', the nextComparisonPage payload shape, its ordering logic (named-not-you first, then most keywords ranked, kind ordering within vs/alternative/pricing, pricing gated on a sourced price claim), and the content-exclusion caveat. It does not discuss caching or latency, but that is minor here.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.