forex_latest

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds only the data source ('Open Exchange Rates'), which is somewhat useful for differentiating providers, but it omits the authentication requirement (api_key) that a caller must satisfy.

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?

One short, front-loaded sentence with no padding. Brevity here is genuinely wasted opportunity rather than bloat, but it is efficiently sized for what it says.

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?

Three undocumented parameters, no output schema, and heavy sibling overlap in the forex/rates namespace. The description does not give enough to select this tool over its alternatives or to supply a valid api_key/symbols value, so the definition is incomplete for the tool's complexity.

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% for three parameters (base, api_key, symbols), so the description carries the full explanatory burden — and it explains none of them. It does not say what base defaults to, what format symbols takes (comma-separated codes?), or that api_key is effectively required for a successful call.

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?

States a clear verb+resource ('Get latest forex exchange rates') and names the upstream provider, so the action is unambiguous. However it does nothing to distinguish itself from the many sibling forex tools (forex_rate, forex_convert, forex_historical, frankfurter_latest, exchangerate_latest).

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 on when to use this versus forex_rate, forex_convert, forex_historical, or frankfurter_latest, and no mention that an API key is needed. The agent must guess from the name alone.

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