Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations at all, the description carries the full burden: it does convey destructiveness and the bookmark-content risk, which is valuable. It omits whether deletion is permanent, whether subfolders cascade, permission requirements, and response behavior — significant gaps for an unannotated mutation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.