Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, openWorldHint=false and destructiveHint=false, so safety is covered. The description adds almost no behavioral context: it does not say whether the job may still be running, whether failures are truncated, or whether checkpoint data is stable across polls — the kind of context that actually matters for a status endpoint.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.