Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full transparency burden. It discloses that the tool returns canonical URLs, that the content is educational only, and that it is not financial advice or a recommendation mechanism. It does not mention authentication, errors, or output format, but for a zero-parameter read-only getter these gaps are minor.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.