Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly/not-destructive, so the safety profile is covered. The description adds real context beyond that: the returned markdown includes the 'Reproduce this' contract and an attached capability disclosure (tier + findings), plus the requirement to re-check live artifacts before executing. It doesn't mention pagination or limits, but the added workflow context is genuinely useful.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.