stablecoin_rates

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

No annotations are provided, and the description fails to disclose any behavioral traits such as rate limits, data freshness, required permissions, or side effects. The mention of pricing and a free tier is about cost, not behavior.

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 very short, but it includes pricing and an API link which are not strictly functional. It lacks structure but is not overly verbose.

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 does not specify what the tool returns (e.g., a list of rates per stablecoin, against which currency) or the output format. Given no output schema, this omission leaves the agent uncertain about the result.

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?

The tool has no parameters, and the description does not need to explain any. Schema coverage is 100% (empty schema), so the description adds no value but also does not mislead. Baseline of 4 for zero-parameter tools is appropriate.

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 '稳定币汇率' (stablecoin rates), indicating the tool returns exchange rates for stablecoins. However, it does not specify which stablecoins or reference currencies, nor does it distinguish itself from similar tools like forex_rate or crypto_price.

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 like crypto_price or forex_rate. The description lacks any contextual or conditional usage advice.

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