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

Beyond annotations, the description explains the payment flow, that Postedly charges only a service fee, what is returned, and critically that the tool does not sign, approve, pay for or send the check. It discloses the human review and browser payment requirement, which is important behavioral context.

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 front-loaded and appropriately sized, with the core action and limitations stated early. It repeats the fee and review link in the return list after already mentioning them in the opening sentence, which is minor redundancy but not harmful.

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 non-output-schema tool, the description explains returns, fees, the review link, and the required next steps. It is still missing explicit semantics for bankRef and memo, and does not mention idempotency, but the overall workflow is clear.

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 coverage is 50%, with payee and amountCents described in the schema. The description adds useful context that the account is the owner's ready checking account and the amount is the check face value, but it does not explain bankRef or memo semantics, so it only partially compensates for the remaining gap.

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 verb and resource: drafts one paper check drawn on the owner's ready checking account. It also distinguishes the operation from final payment by saying it does not sign, approve, pay for or send the check, which separates it from checkout-like 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 clearly sets the context: this creates a draft and returns a review link, while the owner must review, sign and pay in the browser. It does not explicitly name alternative sibling tools such as postedly_checkout or postedly_quote, but the when-not-to-use boundary is clear.

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