Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of behavioral disclosure. It adds value by noting the 'no-op if already cloned' idempotency and the sandboxed workspace destination. However, it doesn't disclose other aspects like network requirements, authentication, or error behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.