Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description thoroughly explains side effects: approval moves the deadline by the requested hours and is recorded on the hash chain; declining leaves the original deadline binding. This directly addresses mutability and persistence, and it does not contradict the annotations (readOnly=false, idempotent=false, destructive=false).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.