Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so safety and reproducibility are covered structurally. The description adds nothing beyond the title — no note on what is produced, whether files are written, or framework-specific behavior. With annotations carrying the entire behavioral load, the description contributes no extra context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.