pay_l402_api

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

No annotations provided, so description carries full burden. Discloses automatic payment detection, protocol support, and agent key requirement, but omits details on error handling, max_payment_sats behavior, return value, or side effects on balance.

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?

Two sentences with a note, front-loaded with main purpose, no redundancy. Each sentence adds value.

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?

Covers core functionality but lacks return value description (no output schema), error scenarios, and payment deduction details. Adequate but not fully comprehensive for a payment-related tool.

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 100%, so description adds minimal extra meaning. Mentions max_payment_sats implicitly but provides no additional parameter-level context beyond what's in the schema.

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?

Clearly states 'Make a request to a paid API' with specific protocols (L402, X402) and automatic payment. Distinguishes from siblings as the only tool handling paid API calls.

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?

Specifies automatic detection and payment, protocol preference, and agent key requirement. Lacks explicit when-not-to-use vs alternatives like pay_invoice or regular HTTP tools, but provides clear context for its intended use.

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