Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full behavioral disclosure. It clearly indicates the tool blocks/pauses execution for the provided duration and that the only effect is a time delay. This is accurate, though it omits details like valid range or potential timeouts.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.