Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and a closed-world scope, so the safety profile is covered. The description usefully adds the completeness of the result set (everything since launch, including ended jobs) and that folders are attached. It does not disclose ordering, result size, or whether the listing is truncated, which matters for an unbounded history list.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.