Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden. It states the tool returns short descriptions and links for each offering, which is useful behavioral information about the output. It does not disclose data freshness, authentication needs, or potential errors, but for a simple read-only catalog tool this seems sufficient.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.