Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the burden of behavioral disclosure. It clearly reveals that the operation returns ready-to-embed SVG markup rather than a URL or binary file. It does not describe error conditions or authentication, but for a simple one-parameter fetch this is acceptable.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.