Latam Exchange Rates

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

With no annotations provided, the description carries the full burden. It does disclose useful non-obvious behavior: rates are expressed as local currency units per 1 USD, and data is updated daily. However, it does not address what happens on invalid currency codes, whether filters are strict, or any error/edge-case behavior, leaving some transparency gaps.

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?

Three crisp sentences, each serving a distinct purpose: main scope, coverage list, and rate semantics/update frequency. No filler or repetition, and the most important information is front-loaded.

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 low-complexity tool with one optional parameter and an output schema, the description covers the essential elements: scope, filter, units, and freshness. It is slightly incomplete in that it leaves alternative-selection and error handling implicit, but nothing critical is missing for a straightforward invocation.

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%, so the description must compensate. It does by listing all accepted currency codes and explaining the optional filter behavior. This adds meaning beyond the bare 'array of strings' schema, though it does not explicitly state response behavior for unknown codes.

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 opens with a specific verb+resource: 'Get current USD exchange rates for all Latin American currencies at once.' This clearly differentiates the tool from sibling country-specific tools like argentina_exchange_rates and costa_rica_exchange_rate, and the explicit currency list reinforces the exact scope.

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 'at once' phrasing implies the tool is for bulk multi-currency needs, and 'Optionally filter with `currencies`' gives basic invocation context. However, there is no explicit when-not-to-use guidance or mention of alternatives such as currency_convert or country-specific rate tools, so usage context is only implied rather than explicit.

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