Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish the safety profile (readOnly, idempotent, non-destructive, closed-world). The description adds genuine context beyond them: the return payload is a continue_url intended for website handoff with configuration restored, telling the agent what the call actually yields and why.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.