Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already cover the safety profile (readOnly, idempotent, non-destructive), and the description adds genuinely new behavior: the default timeout (30000), the maximum (120000), and that a timeout is not an error but a partial-report return. It doesn't say how long a call may block relative to the requested timeout or whether partial reports are marked, which keeps it below a 5.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.