Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and idempotentHint=true, and the description adds real context on top: it is a soft delete that sets `dismissed_at`, the row remains queryable via list_signal_inbox(include_dismissed=true), and it is reversible via restore_deleted with kind `inbox_item`. The tier gating note (sp500+, sample rejected) further explains an error mode an agent may encounter.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.