Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. It does disclose the key mutation effect — the signoff's status changes from sent back to draft — which is real added value. It is silent on side effects (recipients, attachments, notification emails), permission requirements, and reversibility (whether it can be re-sent), which matters for a state-changing tool with zero annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.