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

With no annotations, the description carries the full burden and does disclose the two behaviors an agent most needs: a paid call at $0.005 USDC per request via x402 (_meta["x402/payment"]) and a free 3-row preview via sample=true. It omits rate limits, error/failure behavior when payment is missing, and what a response looks like, so it is strong but not exhaustive.

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?

Front-loaded with the resource, then routes, then commercial terms — an efficient ordering with no filler. The semicolon-dense route/pricing sentence is slightly run-on but every clause carries operational 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?

Payment mechanics, the free sample escape hatch, and per-route parameters cover the call-time essentials. But with no output schema, no annotations, and a nested 'params' object, the description never says what a returned record contains (fields, granularity, pagination semantics of limit/offset), leaving a meaningful gap for an agent composing a request.

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 coverage is 100%, so a baseline of 3 applies, but the description adds real value beyond the schema by enumerating which query parameters each route accepts (year/level/by/limit/offset for /top, from/to for /countries/{iso2}), which the schema's generic 'params' object does not convey. It stops short of explaining the meaning of ambiguous params such as 'level' and 'by'.

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 names a specific dataset ('Armed Conflict Events by Country and Region') and characterizes it as 'clean yearly conflict numbers', which tells an agent exactly what resource this returns. It is clear and concrete, but it never contrasts with the many sibling data APIs (notably the similarly-named 'regions' tool, which could be confused with the /regions route).

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?

It lists the three routes and their parameters plus use-case audiences ('risk dashboards, travel-safety apps, news tools'), which implies usage. However, there is no explicit when-to-use / when-not guidance, no guidance on choosing /top vs /regions vs /countries for a given question, and no disambiguation from the sibling 'regions' tool.

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