Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already flag destructive=true, idempotent=false and openWorld=false, and the description adds substantial context beyond them: edits are atomic, redlines are not produced, unchanged text and comment anchors are preserved, ambiguous matches and edits touching pending application-editor changes are rejected, conflicting revisions abort without applying changes, and the response exposes orphaned_discussion_ids. The only gap is that it never says what a successful response looks like beyond that one field, though an output schema covers it.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.