Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It does disclose a meaningful trait beyond the obvious — that API tokens are never exposed — and specifies that names (not full board objects) are returned, but it is silent on ordering, whether archived boards are included, and any pagination or rate-limit behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.