Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden, and it does disclose non-obvious behavior: the server independently re-diffs, a contradiction surfaces as a 409 error result, and an attestation naming the in-force ledger version is returned. However, it says nothing about permissions, idempotency, or what state the order mutates, leaving material gaps for a write operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.