Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must carry the full burden of behavioral disclosure. It only states the action ('Create a new leave') but does not disclose side effects, auth requirements, data validations, return values, or consequences of creation. This is a minimal mutation description with no additional behavioral context, similar to the update_drive example that scored 2.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.