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

No annotations exist, so the description carries the full load, and it does disclose the non-obvious commercial traits: paid at $0.002 USDC on Base or Solana, no account or API key required, and failed calls are not charged. It omits anything about rate limits, result freshness, or how a partially failed response is billed, which keeps it below a 5.

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?

Front-loads the payment flag, then states what the data is and where it comes from, then cost/auth/failure terms, then the endpoint URL. Short declarative fragments with no filler; the URL is genuinely actionable for an agent that calls the endpoint directly.

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, the description usefully signals the return payload (pools, APY, TVL) and the source (DefiLlama), plus payment mechanics, so an agent knows what it gets for its money. It stops short of describing pagination, response field names, or empty-result behavior for a zero-required-param tool.

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?

All three parameters (sort, limit, min_tvl_usd) have schema descriptions with defaults at 100% coverage, so the schema does the work. The description adds nothing about sort ordering semantics, limit behavior, or how min_tvl_usd filters pools, so the baseline 3 applies.

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 specific resource and scope: live pools holding LSETH, across protocols and chains, returning APY and TVL from DefiLlama. Against the many sibling token-yield tools, the token binding (LSETH, not the general yields or chain/protocol variants) makes the intended call unambiguous.

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 the LSETH scoping rather than stated: an agent can infer this is the tool for LSETH yield opportunities, but nothing tells it when to prefer buy_yields_token_steth or buy_yields_top, or whether an empty result should fall back to the chain/protocol variants. No explicit when/when-not guidance.

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