Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already flag destructiveHint=true and openWorldHint=true; the description adds the entitlement requirement, the 'approved draft' precondition, and the public/irreversible nature of publishing. It does not spell out that the action cannot be undone or who can revoke a scheduled post, leaving some behavioral detail to the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Three short sentences, front-loaded with the action and effect, then prerequisites, then the format constraint. Every sentence carries information and none is filler.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a two-parameter, no-output-schema scheduling tool, the description covers action, entitlement, preconditions, and the input format constraint. Only minor gaps remain (what confirmation/result the agent should expect after scheduling).

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and both parameters are already documented, including the 'must be in the future' constraint and date-time format. The description's 'scheduledDateTime must be future UTC ISO-8601' restates the schema rather than adding new meaning (no timezone-conversion or granularity guidance).

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource (schedule an approved draft) plus the effect (public publishing to its stored platform). It becomes clear this is deferred publishing, which implicitly separates it from the sibling publish-post, though that contrast is never made explicit.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives real preconditions: scheduling entitlement is required, and the description tells the agent to confirm content, destination, and timezone beforehand. It does not explicitly say when to choose this over publish-post for immediate publishing, so it stops short of 5.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.