Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description discloses the primary behavioral trait: it changes the alert's state to read. However, with no annotations provided, the description carries the full burden and does not clarify idempotence, scope, reversibility, or side effects. The presence of an output schema reduces the need to describe return values.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.