Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It only says 'flush' without explaining side effects, reversibility, required permissions, or impact on site performance. The description lacks any contextual detail about what happens when the cache is flushed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.