Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already disclose readOnlyHint=false, idempotentHint=false and destructiveHint=false, so the mutation/safety profile is partially covered by structured data. However, the description supplies nothing beyond those annotations – no mention of required parent context (e.g. which quantitative risk study a scenario belongs to), permissions, validation behavior, or whether re-invocation creates duplicates (which matters given idempotentHint=false).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.