x402_catalog

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

With no annotations provided, the description carries the full burden. It conveys that the operation is a 'live' and 'FREE' fetch, suggesting a read-only, non-destructive action with current data. However, it does not disclose caching behavior, error handling, or side effects, leaving some behavioral transparency gaps.

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, front-loaded sentence that immediately states the action and resource. It is concise with no extraneous words, earning every character.

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?

Since there is no output schema, the description correctly explains the return content by naming the catalog's contents (endpoints, prices, param specs, payment requirements). It does not specify the return format or pagination, but for a simple 0-param fetch, the information is fairly complete.

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 tool has zero parameters, so the schema is vacuously complete. Per the baseline of 4 for 0-param tools, the description does not need to explain parameter semantics, and it appropriately omits any 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 clearly states the tool fetches the live x402 catalog from fry.farm, listing specific contents (endpoints, prices, param specs, payment requirements). This distinguishes it from sibling tools like x402_catalog_refresh, which implies a refresh action rather than a fetch.

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 usage when the current catalog information is needed, but does not explicitly contrast it with alternatives like x402_catalog_refresh. The 'live' qualifier and 'FREE' hint at when to use it, but there is no direct guidance on selection among sibling tools.

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