buy_pack

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

No annotations are provided, so the description carries full burden. It clearly discloses the key behavioral trait: it returns payment requirements and flow, and the agent's own wallet executes the USDC payment against the endpoint. It does not mention auth, rate limits, or whether the call itself is read-only, but the non-execution behavior is well covered.

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?

Three tightly written sentences. Purpose is front-loaded, followed by parameter values and return behavior. No filler or repetition.

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?

Given one required parameter, an existing output schema, and no annotations, the description covers purpose, parameter values, and the critical non-execution behavior. It omits routing to alternatives such as list_packs and any prerequisites, but the core information is sufficient for an agent to call it correctly.

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 description coverage is 0%, and the only parameter 'pack' is undocumented in the schema. The description compensates by stating 'pack: "25", "50", or "100"', providing the exact allowed values. This is strong added value beyond 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?

States a specific verb 'Get' and resource 'x402 payment requirements and step-by-step buying flow for a Scout Pack.' It distinguishes itself from list_packs by focusing on the buying flow rather than listing available packs.

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?

No explicit when-to-use or when-not-to-use guidance. It does not mention list_packs or lookup_lead as alternatives, nor does it state prerequisites. Usage is only implied by the tool name and stated purpose.

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