Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. 'Check if' indicates a read-only status query and suggests a boolean result, but it does not disclose what happens when Blender is not running, whether the check is local or remote, or the exact return shape. It is not misleading, just thin.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.