Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, destructiveHint:false and openWorldHint:true, so the safety profile is covered by structured data. The description adds only that the endpoint is 'public' (consistent with openWorldHint) and lists return payloads; with annotations carrying the safety burden, the marginal behavioral value is thin, and nothing about auth needs, network failure modes, or what happens on an unreachable endpoint is disclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.