forex_list_country

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

With no annotations provided, the description must disclose behavioral traits, but it only states the purpose. It does not mention whether this is a read-only operation, if authentication is required, rate limits, or what the actual returned data structure looks like. While not contradictory, it provides minimal behavioral disclosure.

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 with zero unnecessary words. It delivers the core meaning efficiently and is easy to parse quickly.

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 zero-parameter list tool, the description is adequate: an agent knows it returns unique country values for forex. The absence of an output schema is mitigated by the clear phrasing, though a note about the return format (e.g., array of strings) would make it fully complete. Given the simplicity, this is nearly 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, making the schema trivially complete. Per the rubric, the baseline is 4 when there are no parameters. The description adds no parameter-specific information because none are needed, which is appropriate.

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 verb 'Get' and the resource 'unique country values for forex', making it obvious this returns a list of distinct countries. It differentiates from asset-class siblings like stocks_list_country by specifying 'forex', and from forex_list_exchange by specifying 'country'. However, it doesn't explicitly mention the return type (e.g., array) or purpose beyond that.

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?

No guidance is given on when to use this tool versus alternatives like forex_list_exchange or stocks_list_country. There is no mention of prerequisites, typical use cases, or situations where another tool would be more appropriate. The description is entirely silent on usage context.

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