Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided, so description carries full burden. It only states 'save a new note,' which implies a write operation, but does not disclose whether updates are possible, if there are limits, or what the response looks like. Behavioral traits beyond creation are missing.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.