Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds nothing beyond that: no pagination behavior, no result cap, no note about what 'all' means in a multi-tenant or permission-scoped context. For a list endpoint with no output schema, a small amount of behavioral context would have been cheap and valuable.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.