Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden, yet it discloses nothing beyond the read implied by 'get' — no ordering, pagination, limit behavior, or permissions. It also never clarifies how 'queued' differs from 'incomplete' tracks, which is the key ambiguity for an agent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.