Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden. It indicates a scheduling action, but does not disclose whether the scheduling is reversible, what side effects occur (e.g., service disruption), or if confirmation is required. The behavior is partially described but lacks important context about consequences and lifecycle.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.