Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It only states 'Execute' and fails to mention potential side effects such as modifying the Rhino document, arbitrary code execution risks, error handling, or what the return value represents.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.