Signed NAV attestation for agent treasuries: what is this book worth, as of when, computed how (PAID $10.00)

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

Annotations already declare readOnlyHint=false, openWorldHint=true, idempotentHint=false, and destructiveHint=false. The description adds important context beyond annotations: it is a paid call ($10.00), uses a remote POST route, and specifies x402/base/usdc on eip155:8453. It does not detail persistence or failure behavior, but the payment and route disclosure is substantial.

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 purpose is front-loaded in the first sentence, and the route/payment details are compactly appended. There is little wasted prose, though the title is essentially repeated verbatim as the description.

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?

This is a complex 6-parameter tool with zero top-level schema descriptions, and the description does not compensate with input guidance or usage routing. The output schema and annotations help, but an agent still lacks enough information to populate cash, positions, liabilities, and methodology confidently.

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% for 6 parameters, so the description carries the burden of explaining inputs. It only gestures at the domain ('what is this book worth, as of when, computed how'), which loosely maps to cash/positions/liabilities, as_of, and methodology, but it adds no field-level meaning, formats, defaults, or requiredness.

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 and resource: 'Signed NAV attestation for agent treasuries', and frames the output as book value, as-of time, and computation method. It does not explicitly name sibling alternatives, so it falls short of full sibling differentiation.

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?

Provides only domain context ('for agent treasuries') and no explicit when-to-use, when-not-to-use, or alternatives. An agent cannot tell from this description whether to choose it over v1_agent_treasury_report, v1_portfolio_risk, or v1_fund_tearsheet.

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