Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, openWorldHint, and idempotentHint, so the description does not need to restate safety. The description adds context about the quantum superposition response and cat mode, and the 'reopen' parameter description warns it will fail, which is a behavioral hint beyond annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.