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

No annotations provided, so description carries full burden. It discloses real-time, parallel fetching, paid ($0.05 USDC), and detailed payment flow (first call returns requirements). No harmful or unexpected behaviors omitted.

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?

Two sentences with no filler. First sentence states purpose and sources, second adds parallel execution and payment info. Front-loaded and efficient.

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 no output schema, the description gives sufficient overview of return content (prices, rates, gas, yields) and behavior. Lacks specifics on output format or limits, but covers core functionality well.

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 coverage is 100% with adequate descriptions for base and cryptos. The description adds the payment flow for payment_signature but does not significantly enhance understanding of the base or cryptos parameters beyond 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?

Description clearly states it provides a real-time snapshot combining multiple data sources (crypto prices, FX rates, gas fees, DeFi yields) in one parallel call. Distinguishes itself from sibling tools like get_crypto_prices or get_exchange_rates by offering a consolidated view.

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?

Description implies use for broad market snapshot with parallel fetching, but does not explicitly state when to prefer individual tools over this combined call. The payment flow instructions are clear, but alternatives are not mentioned.

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