Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is fully covered. The description adds nothing beyond that: the GET path it quotes is verbatim identical to the annotation title, and with no output schema there is no disclosure of the returned category shape or how a missing id is surfaced (e.g., 404).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.