World Bank indicator

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

With no annotations present, the description carries the full burden, and it does disclose meaningful behavior: a paid x402 endpoint at 0.002 USDC per call on Base, automatic payment when EVM_PRIVATE_KEY is set, and a 402 payment-requirements response otherwise. That is above-average disclosure, though it omits rate limits, response format, and error behavior.

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 compact sentences with no padding, and the payment model is stated efficiently. However, the leading fragment 'World Bank indicator.' is pure tautology and occupies prime front-loaded space without conveying information.

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 two-parameter paid API call with no output schema, the description adequately covers the endpoint, cost, and auth behavior. It is incomplete on the parameter formats and on what data is returned, which an agent needs since there is no output schema to fall back on.

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 both 'country' and 'indicator' have empty descriptions. The URL template only shows positional placement; the description adds no format guidance (e.g., ISO country code, indicator ID like NY.GDP.MKTP.CD), leaving both required parameters semantically undocumented.

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 opening 'World Bank indicator' simply restates the title and tool name without a verb or object of action. The GET path /v1/worldbank/{country}/{indicator} implies retrieval, but the description never states that it fetches indicator data, so the purpose remains inferred rather than declared.

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?

There is no statement of when to use this tool versus the sibling endpoints (preflight, earthquakes, weather) and no prerequisites for choosing it. The payment note hints at a cost condition, but that is billing behavior rather than usage guidance.

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