Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully covered. The description adds the meaningful behavioral detail that output is Markdown and that it enables accurate quoting. However, it does not describe pagination, error behavior, or exact return structure—though an output schema exists, so this burden is reduced. A 3 is appropriate because the description adds useful context without fully characterizing behavior beyond the schema.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.