Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, covering the safety profile. The description adds the purpose and scope (jobs of one build) but does not disclose additional behavioral details like return format, pagination, or rate limits. With annotations covering the safety aspect, a 3 is appropriate – the description adds some value but not rich behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.