Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly/idempotent/openWorld, so the safety profile is covered. The description adds real behavioral context beyond that: results are newest-first, each carries hazard, remedy, company contact and CPSC link, and the tool discloses its own coverage gap ('the answer says so'). It stops short of pagination/rate-limit detail, but the bar is lower with annotations present.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.