Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Description states 'This lookup does not modify the skill,' consistent with annotations readOnlyHint true, idempotentHint true, destructiveHint false. It adds context beyond annotations by detailing identifier flexibility (UUID or kebab-case name) and return contents, which is useful for agent decision-making.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.