Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations available, the description carries the full burden, but it only repeats the action implied by the tool name ('Schedule a post') and offers no side effects, prerequisites, reversibility, or post-conditions. The phrase 'for publishing' is largely redundant since a post is inherently for publishing.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.