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

With no annotations, the description does carry useful operational context: cost ($0.01 per call in USDC on Base, eip155:8453), the x402 payment mechanism and where the payment goes (params._meta["x402/payment"]), plus the HTTP transport. It does not say whether the call is read-only, what happens on an invalid or non-Base token, or what the comparison actually returns, so the burden of disclosure is only partly met.

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 tight sentences: the purpose leads, the pricing/transport follows. Nothing is redundant, and the essential capability is front-loaded before the operational details.

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 paid, two-argument tool with no annotations and no output schema, the description should convey at least the shape of what a comparison returns and the accepted identifier format. It covers payment and transport well but leaves the response content and parameter format entirely unspecified.

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 0% — parameters are bare strings named "a" and "b" with no descriptions. The description implies these are the two Base tokens being compared, but never says whether they are contract addresses, symbols, or names, and it omits any mention of the required _meta["x402/payment"] payload as a practical input.

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?

"Compare due diligence for two Base tokens side by side" gives a concrete verb (compare), a concrete resource (due-diligence reports) and a scope (two Base tokens), which clearly separates it from single-token siblings like basedue__due or basedue__tokenrisk. It stops short of naming an alternative sibling explicitly, so it is clear but not maximally differentiated.

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?

Usage is implied by "side by side" — you call this when you want a head-to-head comparison rather than a single-token report. There is no explicit statement of when not to use it, no prerequisite (e.g., both tokens must be on Base), and no named alternative for single-token lookups.

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