Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations carry the safety profile (destructiveHint=false, idempotentHint=false, readOnlyHint=false), and the description adds the artifact-type scope and the fact that a link is returned. It does not explain that the call produces a new PDF artifact (implied by readOnlyHint=false) or whether re-exporting regenerates content, which is the main behavioral question for this tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.