currency_latest

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

Annotations already declare readOnlyHint, idempotentHint, and non-destructive behavior. The description adds that an API key is required, the return type is pandas.DataFrame, and data is 'latest' (not historical). No contradiction with 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 a standard docstring with param and return sections, which is structured but includes redundancy (first line repeats the annotation title) and a dangling 'here' link without an actual URL. It is not overly long, but some sentences add limited value.

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 description covers the core purpose and parameters, and the annotations confirm it's a safe read operation. However, it lacks output schema details, does not explain possible currency codes or symbols format, and doesn't address errors, rate limits, or when to prefer sibling tools.

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 has 0% description coverage, so the description carries the burden. It explains base and api_key well, but 'symbols' is described as 'a list' while the schema type is string, leaving the format ambiguous. No examples or default values are provided despite defaults existing in the schema.

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 states 'Latest data from currencyscoop.com' and parameter docs clarify it retrieves exchange rates for a base currency with optional symbols. This is clear about the resource and scope, though it lacks an explicit verb and does not distinguish from sibling currency tools like currency_history.

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 such as currency_history or currency_time_series. It also doesn't explicitly state prerequisites like API key requirement or appropriate use cases.

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