Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, idempotentHint=true, and openWorldHint=false, so the safety profile is covered structurally. The description adds the useful fact that the call returns the new location by name, but says nothing about what a move breaks (links, permissions, views) or whether cross-space folder moves are rejected -- worth flagging given the destructive hint.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.