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

With no annotations, the description carries the disclosure burden and does useful work: it reveals that this call only returns a checkout contract, is priced at $0.02 via x402, and triggers no charge or execution yet. Missing details like expected response shape or authorization are not disclosed, but the key side-effect boundary is clearly stated.

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, each carrying a distinct fact: endpoint/product, canonical contract source, price, and side-effect boundary. It is efficient, though the first sentence is somewhat telegraphic and assumes knowledge of 'Batcave'.

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 6-parameter paid tool with no output schema and no annotations, the description is incomplete: it fails to map the input schema to the product contract, explain what the returned contract contains, or describe how to proceed after obtaining it. The side-effect guarantee is helpful but not sufficient.

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 0% and the description explains none of the six parameters (proposed_action, evidence, risk, task, job_id, reasoning_summary). An agent cannot tell what values to pass or how they affect the returned contract.

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?

The description explicitly names the endpoint (/v1/review-decision), identifies the tool as a paid Batcave product, and states the immediate behavior: it returns the canonical REST/x402 checkout contract rather than executing the product. This is a concrete verb+resource, though it does not tie back to the evidence-judging semantics or distinguish itself from siblings.

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?

It provides no explicit when-to-use or alternative routing; it never mentions detective_basic or scenario_council. It does clarify a boundary (does not charge/execute), but an agent still has to infer when retrieving the checkout contract is the right step.

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