Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. The 'raw' qualifier adds genuine context that title/excerpt/content are unfiltered revision values, distinguishing the output from regular post/page getters. However, it does not address permissions, what 'raw' entails, or behavior when the revision or ref is invalid.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.