Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds genuinely new behavioral facts: the output is Markdown prompts/acceptance checks and nothing is created or executed, which a name like 'eval' would otherwise imply. It stops short of describing depth/format of the generated checks, but that is partly covered by the output schema.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.