Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations provide only basic flags (readOnlyHint false, idempotentHint false), leaving the description to disclose behavioral implications. The description only says 'Create a Markdown entry' and omits details about the confirm parameter, side effects, idempotency, or return values. It adds little beyond what the annotations already imply.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.