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. The term "canonical" conveys authority and the phrase "when available" adds nuance about conditional data. The read-only nature is implied by "Return," and there are no side effects to disclose. It does not mention output format or edge cases, but for a zero-parameter read tool this is adequate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.