Get QuokkaPix agent payment options

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It explicitly states the tool is non-transactional ('does not sign, submit or consume a payment') and describes the data as 'live', indicating a network fetch. It does not discuss authentication or failure behavior, but the most critical side-effect disclosure for a read-only tool is present.

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 compact and efficiently structured: the first sentence states exactly what is fetched, and the second sentence clarifies a key behavioral boundary. There is no filler or repetition of schema details, and the most important information is front-loaded.

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 tool with one optional parameter, no output schema, and no annotations, the description does enough by enumerating the returned information (tiers, free limits, endpoints) and stating the non-transactional nature. It does not explain the return structure, but this is not essential for an agent deciding whether to invoke the 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?

The description does not discuss parameters, but the single parameter baseUrl is fully documented in the input schema, including its optional nature and default value. With 100% schema description coverage, the baseline of 3 applies; the description does not need to add further parameter details.

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 uses the specific verb 'Fetch' and identifies the exact resource: 'QuokkaPix Image and Video payment tiers, free limits and product-specific x402 endpoints'. It also adds an important boundary by stating the tool 'does not sign, submit or consume a payment', which differentiates it from payment-related actions even without naming sibling tools.

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 clear context for when to use the tool: when an agent needs live payment tier data, free limits, or product-specific x402 endpoints. It also includes an exclusion by stating it does not sign, submit, or consume a payment. However, it does not explicitly name alternatives like explain_payment_flow or verify_unlock_token, so it falls short of full alternative-based guidance.

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