Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose safety, side effects, and process. It says 'preview and hash-bind' but never clarifies whether this mutates anything, whether it requires confirmation, or whether it is read-only. The phrase 'hash-bind' is jargon and unexplained, and 'exact' does not convey what happens to the file. An agent cannot infer the tool's behavioral profile.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.