Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, idempotentHint=false and openWorldHint=true, so the safety profile is covered. The description adds genuinely useful behavior: atomic all-or-nothing writes keyed to expected match counts, and the fact that dist edits go live immediately while source edits only ship via build_and_deploy.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.