currency_currencies

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description is not required to repeat safety. It adds useful context beyond annotations: the data source (currencyscoop.com), the need for an api_key (with instructions), and the c_type restriction. However, it does not explain behavior like pagination, rate limits, or what 'Latest data' precisely contains.

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 relatively compact but not well-structured. It mixes a noun-phrase intro, a URL, and docstring-style param/return blocks. Type information (e.g., ':type c_type: str') is redundant with the schema and adds noise. It is acceptable but not ideal.

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 and only two simple parameters, the description should clarify what the returned DataFrame contains. The phrase 'Latest data of base currency' is vague, and there is no base currency parameter, making the intended result unclear. The api_key and c_type parameters are explained, but the core purpose and return structure are not adequately specified.

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 explains c_type (only 'fiat' works) and api_key (where to find it, use as password), which adds meaning beyond the bare schema. However, it does not define possible c_type values or what api_key authentication accomplishes, leaving some parameter semantics ambiguous.

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 says 'currencies data from currencyscoop.com' and 'Latest data of base currency', but there is no clear verb or definition of what the tool actually returns. It does not distinguish from sibling tools like currency_latest or currency_history, and the intended output (list of currencies vs. exchange rates) is ambiguous.

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 provided on when to use this tool versus alternatives. There is no mention of sibling tools or scenarios where this would be preferred. The only constraint noted is that c_type supports only 'fiat', but this is a parameter limitation, not usage guidance.

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