Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden and does disclose key mutation behavior: it adds a definition to AppDimens.kt/AppColors.kt, replaces ONLY the specified line, and touches no other line. It also warns that force_create bypasses duplicate detection. It omits permissions, failure modes, and whether edits enter a pending-approval workflow implied by siblings like approve_file_changes.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.