Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It does disclose a key side effect: the device auto-un-arms when the last route is removed, preventing unnecessary traffic pausing. However, it omits other behavioral details such as error handling, reversibility, or the impact on existing routes, which are relevant for a mutating operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.