Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of explaining behavior. It discloses the conversion behavior, the markdown output, structure preservation, and a pay-per-use cost hint. It does not cover input format requirements, language limits, or failure behavior, so transparency is only partial.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.