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

The annotations already declare readOnlyHint=true and destructiveHint=false, and the description's 'Get' aligns with that safe, non-mutating profile. The description does not add further behavioral context, such as whether quotes are indicative, rate-limited, or require authentication, but the annotation covers the most critical 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 a single efficient sentence with no filler or repetition. It front-loads the verb and the resource, making the core purpose immediately scannable.

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 ten optional parameters, a nested `params` object, and no output schema, this minimal description leaves significant context unstated: which parameter combinations are required for a valid quote, how amount/tokenAmount interact, and what the returned quote contains. The schema provides per-parameter definitions but not the higher-level usage context an agent needs.

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 100%, so the schema independently documents all ten parameters. The description's 'fiat-to-USDC' phrasing reinforces that `from` is fiat and `to` defaults to USDC, but it adds little meaning beyond the existing per-parameter descriptions.

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 a specific action ('Get') and a specific resource ('fiat-to-USDC exchange quotes'), clearly identifying this as a quote lookup tool. It does not explicitly differentiate itself from siblings like peer_cash_quote_source or peer_cash_estimate, but the fiat-to-USDC scoping gives a clear core purpose.

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?

The description offers no guidance on when to use this tool instead of alternatives such as peer_cash_quote_source, peer_cash_estimate, or other quote-related siblings. There are no stated conditions, exclusions, examples, or mention of which inputs are needed to produce a valid quote.

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