gdmx_create_checkout

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

No annotations are provided, so the description carries the burden of behavioral disclosure. It discloses a key behavior: the checkout is a parallel race where the fastest provider wins, and funds go directly to the merchant wallet. However, it does not disclose side effects (e.g., whether a charge is created, whether funds are held, whether the operation is irreversible), nor does it mention any required authentication or rate limits. The description adds some behavioral context but leaves significant gaps for a financial operation.

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 a single, compact sentence that front-loads the core purpose and includes the most important behavioral detail ('parallel race, fastest provider wins'). Every word earns its place; 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?

For a financial checkout tool with no annotations and no output schema, the description is moderately complete. It explains the core flow (card→USDC, race, direct to merchant wallet) but does not mention what the response contains, whether the operation is synchronous or asynchronous, or any failure modes. Given the tool's complexity (4 params, financial implications), more context would be valuable, but the description covers the essential purpose.

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 100%, so the schema already documents all four parameters. The description adds the 'card→USDC' context and the 'direct to merchant wallet' detail, which clarifies the 'to' parameter's role. However, it does not add meaning beyond the schema for 'amount', 'chainId', or 'provider'. Baseline 3 is appropriate because the schema does the heavy lifting.

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 ('create') and resource ('card→USDC checkout'), and adds a distinctive behavioral detail ('parallel race, fastest provider wins, direct to merchant wallet'). It is clear what the tool does, though it does not explicitly differentiate from siblings by name. The sibling list contains unrelated tools (resolve, sync, names, apikey, providers, profile), so the description is sufficient to distinguish it from them.

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 implies the use case: creating a card-to-USDC checkout with a parallel race. It does not explicitly state when to use this tool versus alternatives, nor does it mention exclusions or prerequisites. The sibling tools are mostly unrelated, so no alternative is named. The 'parallel race' detail gives some context but not explicit guidance.

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