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

With no annotations, the description carries the full behavioral disclosure burden. It adds value by mentioning that the check is 'live', that it costs $0.003, and that it involves a 'real 402' and checks for 'challenge shape' and 'payTo consistency', implying active HTTP interaction with the endpoint. It does not discuss auth, rate limits, or side effects, but the cost and live nature are meaningful disclosures.

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?

The description is two dense sentences with no filler. The first sentence front-loads the core purpose and cost, and the second enumerates the specific checks. Every phrase contributes 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?

The description covers the core purpose, cost, and check criteria, and the output schema likely explains the returned badge structure. However, it omits semantics for the agent_id parameter, provides no usage guidance or exclusions, and lacks behavioral caveats beyond cost. For a paid live check with no annotations, this is adequate but not complete.

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%, so the description must compensate. It indirectly identifies 'url' as the seller endpoint, but it never explicitly names 'url' or 'agent_id', and agent_id is completely unexplained. The check criteria are endpoint behaviors, not parameter meanings, leaving the optional parameter's purpose unclear.

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 states a specific action ('live conformance check of a seller endpoint'), a clear outcome ('gold/silver/bronze badge'), and enumerates concrete checks ('discovery manifest, real 402, challenge shape, payTo consistency'). This distinguishes it from more generic sibling tools, though it does not explicitly contrast it with similar conformance tools like ddg_checkout_conformance.

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?

No explicit guidance is provided on when to use this tool versus alternatives. The purpose implies use for evaluating seller endpoint conformance, but it does not mention when not to use it, what prerequisite conditions exist, or how it compares to functionally similar siblings.

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