btc_price

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

No annotations are given. The description mentions the cost ($0.02/call) and free tier limit, which is helpful, but it does not disclose read-only nature, authentication needs, rate limits, or other behavioral traits. Important gaps remain.

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 extremely short (two lines) but front-loads pricing and API URL rather than core purpose. It is concise but sacrifices substance, lacking a clear structure.

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, the description should explain the return value (e.g., price in USD, timestamp). It does not, leaving the agent unaware of what data will be received.

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?

There are no parameters; schema coverage is 100% by default. Per guidelines, 0 parameters earns a baseline of 4. The description does not need to add parameter info.

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 name 'btc_price' strongly implies Bitcoin price, but the description only says 'BTC价格' (Chinese for BTC price) and focuses on pricing and API URL. It does not explicitly state that it returns the current Bitcoin price, making it somewhat vague.

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 usage guidelines are provided. The description does not indicate when to use this tool over siblings like 'crypto_price' or 'token_price', nor does it mention prerequisites or alternatives.

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