Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden; it does disclose the single most important trait, that deletion is irreversible and permanent. It says nothing about what is destroyed alongside the page (comments, attachments, children), whether confirmation or elevated permissions are required, or how a missing slug is handled.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.