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

No annotations are provided, so the description carries the full burden, and it does disclose the specific outputs an agent will receive (bid, ask, midpoint, absolute and relative spread, one-sided flag). It does not mention the x402 payment/auth requirement, rate limits, or failure behavior for an unknown token, which keeps it out of the top band.

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, zero filler, with the primary purpose front-loaded and the sibling disambiguation second. Every clause carries information the agent needs.

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 and no annotations, the description steps in by enumerating the returned fields, which is the main completeness risk for a read-only market-data tool. The only meaningful gap is the accepted token identifier format, which is undocumented in both the schema and the description.

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 0%, so the description must compensate for the single `token` parameter. It clarifies the domain — a Polymarket outcome token — but adds no format detail (token id vs. ERC-1155 asset id, numeric vs. hex string), leaving the agent to guess the accepted value shape.

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?

States a concrete deliverable for a defined resource: top-of-book signals (best bid, best ask, midpoint, absolute and relative spread, one-sided flag) for one Polymarket outcome token. It explicitly names the sibling it is not, x402-poly-clob, so an agent can distinguish the two without opening either schema.

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?

Gives an explicit routing rule: use x402-poly-clob when the full book is needed rather than the top of it, which by implication says when to use this tool (shallow quotes / summary view). No exclusions or prerequisites are stated (e.g. that a payment/x402 handshake or a valid token id is required), so it falls short of full when/when-not coverage.

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