Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, and non-destructive behavior, so the safety profile is covered. The description adds useful scoping (server-owned, durable, authenticated user) but does not disclose behavior such as ordering, pagination, or what the returned items look like; this is consistent with the calibration example where read annotations plus scoping but no output behavior earns a 3.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.