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

With no annotations, the description carries the full behavioral burden and does well by explicitly ruling out authorization, signing, relaying, and broadcasting. It also discloses that a short-lived Insight signature is bound when configured, though it does not describe whether evidence is persisted, returned, or otherwise exposed.

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?

The description is short, front-loaded with the core action, and wastes little space. The second sentence adds important safety boundaries, though the term 'Insight evidence' remains jargon that slightly reduces immediate clarity.

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 complex nested-schema tool with no annotations and no output schema, the description covers purpose and non-execution behavior but leaves major gaps around the required guard fields and what the created evidence consists of. An agent would still need substantial inference or trial-and-error to populate the input correctly.

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% and the input schema has two nested objects with many required fields. The description maps some key transaction fields (target, calldata, sender, nonce, value) and mentions 'protocol market', but it does not explain the guard fields such as action, collateralSymbol, loanSymbol, collateralValueUsd, or debtValueUsd, leaving much of the required schema undocumented in both places.

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 states a specific verb+resource: create portable Insight evidence for one exact unsigned direct reviewed EVM lending call, and names the supported chains. It distinguishes itself from a generic guard through 'exact unsigned direct reviewed' but does not explicitly name or contrast with the sibling multichain_evm_lending_guard or chain-specific exact_call tools.

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?

It clarifies this is for an exact unsigned lending call and explicitly says it never authorizes, signs, relays, or broadcasts, directing authorization to PriorSeal. However, it does not explain when to choose this tool over the sibling multichain_evm_lending_guard or base_lending_guard_exact_call, nor does it state required preconditions beyond the call being exact and reviewed.

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