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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds only the DeFiLlama provenance; it omits notable behavior such as the masked free dataset versus the paid/unmasked unlock path, which lives only in the parameter descriptions.

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 compact sentences, front-loaded with the capability and followed by the filtering scope. Minimal waste; phrasing is slightly marketing-flavored ('radar', 'powered by') but still informative.

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 read-only query tool with all six parameters fully documented in the schema and a complete safety annotation set, the definition is sufficient. The free-vs-paid data masking nuance is covered by the schema parameter descriptions, so the omission from the prose is minor.

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 baseline is 3. The description's token examples (USDC, ETH, USDT, WBTC) and the chain/TVL filter mention largely restate what the schema already documents, adding no syntax or default guidance beyond it.

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 verb ('Finds') and resource ('top lending and liquidity pools') plus the data source (DeFiLlama), which cleanly separates it from siblings like defi_swap_quote or token_alpha. It does not explicitly name a sibling to avoid, but the resource is 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?

The description implies when it is relevant ('for any token... filtered by blockchain and minimum TVL') but never states when to prefer it over alternatives or any prerequisites. Usage is inferable rather than spelled out.

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