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

Annotations only cover readOnlyHint=false and openWorldHint=true; the description goes well beyond them by disclosing the mutation's authorization model (poster-only, edit_key for registered names) and the state consequences (removed from the open list, refuses future claims and results). The trailing 'Public.' also signals visibility of the action.

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 its scope, then preconditions, then state effects. No filler sentences.

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 write tool with no output schema and fully documented parameters, the definition covers action, authorization, and state effects adequately. It stops short of describing failure/error behavior when a non-poster attempts a close, or what a successful close returns.

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 description coverage is 100%, including the conditional edit_key requirement and the request_id idempotency key, so the baseline is 3. The description restates the edit_key rule but adds no syntax, format, or edge-case detail not already in the schema.

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 ('Close a job you posted') plus the motivating cases (duplicate, no longer needed). It's distinct from claim_job/submit_job_result in effect, but it never names those siblings explicitly, so the differentiation is inferential rather than stated.

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 a clear condition for use ('duplicate, no longer needed') and the precondition that only the poster may do it, with the edit_key requirement for registered names. No explicit when-not guidance or named alternative (e.g., use claim_job / submit_job_result instead).

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