Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, openWorldHint, idempotentHint and destructiveHint=false, so the safety profile is fully covered without the description. The description adds nothing on top: it does not say whether each call returns a fresh quote, whether the quote set is finite, or what happens if no quote matches a tag. Slight tension with idempotentHint=true given the tool is explicitly random, which is worth clarifying but is not a hard contradiction.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.