Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already provide comprehensive behavioral hints (readOnlyHint: true, destructiveHint: false, idempotentHint: true, openWorldHint: true), so the bar is lower. The description adds minimal value by indicating it's a GET operation, which aligns with the read-only annotation. However, it doesn't provide any additional behavioral context beyond what annotations already cover - no information about rate limits, authentication needs, error conditions, or what 'default command' actually means in practice.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.