forex_get_gainers_and_losers

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

With no annotations, the description must carry the full disclosure burden. It only reveals that the result is 'top 20' but does not explain how 'direction' determines gainers vs. losers, nor any other behavior such as time period, sorting, or currency pair handling.

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 no redundant or extraneous words. It is highly concise and efficient, even if under-specified in content, which is addressed in other dimensions.

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?

The tool has one parameter and no annotations or output schema, but the description still fails to explain the meaning of the 'direction' parameter or any behavioral details. It is minimally informative and would not fully equip an agent to use the tool correctly.

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 schema lists a 'direction' parameter with a default but no enum. The description hints at 'gainers or losers' but fails to explicitly state that the parameter accepts these values. With schema coverage at 0%, the description does not adequately compensate for the undocumented parameter.

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 uses a specific verb ('Get') and resource ('top 20 forex gainers or losers'), which is unambiguous and distinguishes it from sibling tools for stocks and crypto by explicitly mentioning 'forex'.

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 no guidance on when to use this tool instead of alternatives like stocks_get_gainers_and_losers or crypto_get_gainers_and_losers. It only states the core function without any contextual selection criteria.

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