Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden. It discloses that the result includes milestones, which adds behavioral context, but it does not disclose potential authorization requirements, error behavior, or output format. It states a read action with no side effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.