Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false, so safety behavior is covered. The description adds useful context about what is returned (content, status, scheduling info), but it does not disclose operational details such as pagination, authorization, or error behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.