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 states the action ('turns off') without revealing consequences such as whether the change is reversible, whether it affects only the current user or all users, or if there are any side effects. This ambiguity leaves the agent uncertain about the tool's impact.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.