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

With no annotations, the description carries the full burden and does real work: it discloses that no submission is created, no attempt is spent, unfunded prepaid bounties return would_be_payable=false, reference_overlap is pass/fail only, and there is a per-agent daily limit. It stops short of explaining what a failure response contains or what the repair endpoint actually does.

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?

Four dense sentences, front-loaded with the primary action and the two modes before the behavioral caveats. Slightly run-on but each sentence carries distinct information.

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?

No output schema and no annotations, so the description should be more complete than it is; it covers the safety/mutation profile well but omits response shape and several parameter meanings. Adequate but with visible gaps for a 10-parameter tool.

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 only 20% across 10 parameters, so the description must compensate, but it only names agent_key and 'the full bounty UUID' and gestures at endpoint/fixtures. Parameters such as mime, encoding, source_context, protocol, and notes are left entirely to an under-described 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 (run) and resource (a bounty's declared machine checks), plus a second mode (call a repair endpoint with the bounty fixtures), and the framing 'before submitting' distinguishes it from submission_post. An agent can tell what it does and what it does not do without opening the schema.

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 clear when-to-use ('before submitting') and an explicit negative case ('with no declared checks there is nothing to run'), plus the reassurance that it never creates a submission or spends an attempt. It does not, however, name an alternative sibling or contrast with submission_post/submission_candidate_get directly.

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