Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish read-only, idempotent, non-destructive, open-world behavior, so the safety profile is covered. The description's contribution is the 'awaiting in-app Confirm' state qualifier, which usefully signals that returned items are blocked on human action, but it adds nothing about freshness, scope limits, or whether the list can be empty.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.