Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and readOnlyHint=false, so the description does not need to repeat safety traits. It adds limited context by specifying 'current plate', but does not disclose consequences like permanence, undo options, or impact on associated settings. Since annotations carry the safety burden, a baseline 3 is appropriate, with no contradiction.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.