x402_payment_request

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It discloses one behavioral trait—the monetary cost ('Costs $0.001 USDC via x402')—but omits crucial details such as side effects (e.g., creating a charge, sending a payment request), required inputs, or expected return 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 brief, but this is under-specification rather than effective conciseness. It is front-loaded but lacks substance; the two clauses merely provide a label and a cost, neither of which earns its place as useful operational guidance.

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 payment-related tool with a real monetary cost, the description is radically incomplete. It fails to explain what triggers the charge, how the payment request is made, what the response looks like, or how it relates to sibling tools like x402_verify_payment and x402_wallet_info. Without an output schema or annotations, the description should have carried much more weight.

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 input schema contains a single generic 'params' object whose description is purely tautological ('Tool parameters as JSON object'). The tool description adds no parameter-level meaning, leaving the agent with no clue about the actual fields, required format, or nested structure needed for a payment request.

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 a noun phrase 'x402 payment request' that almost restates the tool name with spaces. It adds 'x402 & Wallet tool' and cost information, but lacks a verb indicating the actual operation (e.g., create, request, initiate). It specifies the domain (x402 payments) but not the specific function, and doesn't differentiate from siblings like x402_verify_payment or x402_pricing.

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?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention any use cases, prerequisites, or exclusions, and offers no context for selecting this tool over related payment or wallet tools in the sibling list.

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