Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety is covered. The description reinforces this with a domain-specific consequence ('never changes which roles GetMattered hunts for') and discloses the exact parameter equivalence to the canonical tool, which annotations cannot express. It does not say whether/when the alias will be removed, a minor remaining gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.