x402_pricing

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

No annotations are provided, so the description carries the full burden. The only behavioral disclosure is that it 'Costs $0.001 USDC via x402,' which is useful. However, the description does not reveal whether the tool is read-only, what operation it performs, what side effects occur, or what the response contains. This is a minimal behavioral disclosure.

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, but brevity without substance is under-specification. It opens with a restatement of the tool name, then gives a cost fact. There is no structured explanation of behavior or inputs. This is not effective conciseness.

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 tool has no output schema, no annotations, and a single generic parameter. The description fails to explain what pricing information is returned, what inputs are required, or how it relates to other x402 tools. It is not adequate for an agent to select and invoke the tool with confidence.

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 contains a single generic 'params' object with no domain-specific fields. Although schema coverage is 100%, the description adds no parameter meaning. The tool's cost and pricing nature suggest inputs like amount or currency, but none are specified, leaving the agent unable to determine what to supply.

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 says 'x402 pricing — x402 & Wallet tool' which essentially restates the tool name and adds a vague category. It does not state a specific action or resource beyond 'pricing,' and it does not distinguish itself from sibling tools like x402_wallet_info or x402_payment_request. The cost information is a detail, not a purpose statement.

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 about when to use this tool versus alternatives. The description mentions a cost but provides no context about the tool's intended scenario, prerequisites, or exclusions. This is absent guidance.

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