Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavioral traits. It only states that activation returns a result and errors, but fails to mention that this is a mutating operation that changes the system state (activating an object), which may require certain authorizations or have side effects. The description is minimal and does not alert the agent to potential impacts.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.