Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=false and openWorldHint=true, and 'Post' is consistent with a write operation. However, the description adds nothing about side effects, permissions, whether followers are notified, or whether prior updates are affected — meaningful gaps for a mutation tool with no destructiveHint.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.