Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds genuine behavioral context beyond this: the dual-mode behavior (list-all vs single retrieve), the 'durable' qualifier distinguishing drafts from ephemeral states, and the scope of what is returned. This is valuable added context with no contradiction to the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.