Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=true and destructiveHint=false, so safety is covered. The description adds genuinely useful context beyond that: the operation is asynchronous, a jobId is returned and must be polled, and it must never be shown to the user. It does not cover error or format-rejection behavior, so it falls short of exhaustive.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.