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

The annotations declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description need not repeat those safety signals. However, the description adds no behavioral context beyond the annotations: it does not disclose what happens to the input, what kind of assessment is produced, whether it returns evidence, or any side effects. It does not contradict annotations, but it provides zero added value, and the description is so thin that it fails to explain the tool's actual behavior.

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 extremely short, one clause plus a phrase. While conciseness is generally good, this is under-specification rather than effective conciseness. The single clause restates the name and adds minimal value. It is not front-loaded with useful information because there is essentially no useful 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?

Despite having an output schema, the tool's purpose is opaque. The description gives no sense of what the atomicity assessment entails, how it relates to payment and delivery, or what the output schema represents. For a tool named 'Payment Delivery Atomicity' with two required parameters and a clear domain, a complete description needs at least a statement of what atomicity means in this context and what is assessed. This is completely inadequate.

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?

The schema has two required parameters, 'payment' and 'delivery', and has 100% schema description coverage (via their names). The description does not add any explanation of these parameters beyond what the names imply. Since schema coverage is high, the baseline is 3, and the description does not exceed that.

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 is essentially a tautology of the name/title: 'Payment Delivery Atomicity; deterministic signed assessment over supplied input.' It does not state what the tool does—only that it produces a deterministic signed assessment over some input. It does not mention payment or delivery atomicity, which are the core concepts in the name. The description is vague and fails to distinguish this tool from the many other assessment/verification tools in the sibling list.

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?

There is no guidance on when to use this tool versus alternatives such as payment_preflight, payment_receipt_reconciler, or transaction_assurance. The description provides no context about the problem it solves, no prerequisites, and no exclusions. It simply restates the tool's existence.

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