Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already provide readOnlyHint, destructiveHint=false, idempotentHint, openWorldHint. The description adds useful behavioral context by enumerating the types of data returned (occupation descriptions, skills, ISCO codes, skill relationships), which goes beyond the annotations. No contradictions.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.