Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations fully declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint, so the description needs minimal behavioral disclosure. It adds that the tool returns 'matching tracks', but does not elaborate on pagination, limits, or empty result behavior. This is adequate given high annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.