Get OPEC Production

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the description does not need to repeat safety traits. It adds value by specifying the return format ('country-level production figures') and the access constraint ('Requires Reservoir Mastery premium tier'). This provides behavioral context beyond the structured annotations.

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 four sentences, each serving a clear purpose: purpose, usage trigger, return format, and access requirement. It is front-loaded with the main verb and object, and there is no redundant or filler content.

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?

With no output schema, the description correctly explains the return value as 'country-level production figures'. It also covers usage context and premium-tier restriction. For a parameter-less, read-only data retrieval tool, this is complete and self-sufficient.

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 baseline is 4 per the rubric. The description refers to 'latest' and 'country-level' output, but these describe the data, not parameters. No parameter documentation is needed.

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 starts with 'Get the latest OPEC oil production data', which is a specific verb+resource statement. It further clarifies the scope by mentioning 'country-level production figures'. While it does not explicitly name a sibling tool, the function is clearly distinct from all listed siblings, which focus on prices, inventories, and drilling.

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 gives explicit when-to-use guidance: 'Use when the user asks about OPEC output, production quotas, supply cuts, or OPEC+ compliance.' It also notes the premium tier requirement. However, it does not state when not to use the tool or name an alternative, so it stops short of a perfect score.

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