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

Annotations already declare readOnlyHint and openWorldHint, so the description's added value is real: it discloses the data source (schema.org product list on the page), the hard scope limit (first page only), and the payment model ($0.002 in USDC per successful call via x402 on Base, Solana or Arc, with failed calls not charged). It stops short of describing rate limits, failure modes, or what happens with an invalid category slug.

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?

Purpose and returned fields are front-loaded, and the pricing note is properly placed at the end. The middle sibling-routing clause is dense and slightly garbled ('from ESPN's', 'from The Odds'), and the whole thing reads as one long comma-and-semicolon chain rather than distinct sentences.

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 two-parameter read tool with an output schema and read-only annotations, the description covers what matters: the source of the data, the first-page scope limit, the fields, and the cost model. The only meaningful gap is behavior for an invalid or unknown category slug.

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 already documents both parameters, including the 1-40 limit range, the default of 10, and the 'academy.com/c/<slug>' category format with the fan-shop example. The description only echoes the fan-shop example and the first-page-only constraint, adding little meaning 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?

The description names a specific verb and resource (retrieve Academy Sports + Outdoors products from one category page) and enumerates the returned fields: name, brand, price in USD, link, image, MPN. It differentiates itself from two siblings by naming them, but those two (dev_espn_sports, dev_the_odds_api_sports) are far less similar than dev_dicks_sporting_goods, which is not mentioned, so the sibling differentiation is only partial.

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?

There is explicit routing to alternatives ('dev_espn_sports when you need ESPN latest news headlines...', 'dev_the_odds_api_sports when you need Pre-match head-to-head odds...'), but no guidance on when to choose this tool over the much closer sporting-goods sibling, nor any prerequisites. The 'First page of the category only' note is a useful scope constraint but is not framed as a when-to-use rule.

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