get_last_forex_quote

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

No annotations are provided, so the description carries full burden for behavioral disclosure. It states only what the tool does ('get'), not how it behaves - no information about rate limits, authentication needs, data freshness, error conditions, or what 'most recent' means (real-time? last recorded?). This leaves critical behavioral aspects completely unspecified.

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 maximally concise - a single sentence with no wasted words. It's front-loaded with the core purpose. While it's too brief to be helpful, it achieves perfect conciseness by stating only the essential action without any fluff.

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 tool with 3 parameters, no annotations, no output schema, and 0% schema description coverage, the description is completely inadequate. It doesn't explain what data is returned, how parameters work, behavioral constraints, or differentiation from similar tools. The minimal description fails to provide the context needed for effective tool selection and 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?

With 0% schema description coverage and 3 parameters (from_, to, params), the description provides no parameter information whatsoever. It doesn't explain what 'from_' and 'to' represent (currency codes? symbols?), what format they should be in, or what the optional 'params' object might contain. The description fails to compensate for the complete lack of schema documentation.

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 'Get the most recent forex quote' clearly states the action (get) and resource (forex quote), but it's vague about scope and doesn't differentiate from siblings like 'get_last_quote' or 'get_real_time_currency_conversion'. It specifies 'forex' which helps somewhat, but lacks precision about what constitutes a 'quote' (bid/ask? mid? volume?).

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 tool versus alternatives is provided. With many sibling tools dealing with quotes, trades, and currency data, the description doesn't indicate if this is for real-time data, historical data, or how it differs from 'get_last_quote' or 'get_real_time_currency_conversion'. No prerequisites or exclusions are mentioned.

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