Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Adds substantial context beyond the annotations: the refusal on removing the only message preceding a recorded reply, the refusal without messageId once Parse has seen the page change, the 'recalls nothing that was delivered' scoping, plan availability, and a prompt-injection warning about quotedMaterial. It does not explicitly note the non-idempotent consequence of repeated no-messageId calls, which is the one trait an agent could still trip over.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.