Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false and destructiveHint=false, so the write/safety profile is partly covered. The description adds essentially nothing beyond the verb: it doesn't say what gets overwritten on the nodes, whether the change is atomic across the uuid list, or what permissions are required for a bulk mutation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.