Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations provide comprehensive safety information (readOnlyHint: true, destructiveHint: false, idempotentHint: true, openWorldHint: true), so the description doesn't need to repeat these. The description adds minimal context beyond annotations - it confirms this is a retrieval operation ('Get') but doesn't describe what format the allowlist data is returned in, whether there are rate limits, authentication requirements, or what 'MSMP' refers to specifically. No contradiction with annotations exists.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.