Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish this as a safe, idempotent, closed-world read operation, so the bar is lower. The description adds only the workspace-scoping constraint; it says nothing about whether a missing draft returns null or errors, or how the 'publication revision' relates to a published state.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.