Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden; 'Show' implies a read-only, non-mutating operation and it usefully discloses that validation problems are returned. However, it does not state that the draft is unmodified, whether any permissions are required, or whether the preview reflects the saved or unsaved state — relevant for a tool whose siblings include push_draft and publish_draft.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.