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

With no annotations, the description carries the full burden and does most of it: it discloses the two-step tx sequence (approve only when allowance is short, then requestDeposit), the non-instant settlement window (up to a week at cohort freeze), the checks performed (balance/cap/eligibility), and that the server holds no keys and sends nothing. It stops short of saying what happens when a check fails (error vs. field in response).

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-loaded with the purpose before the return payload, and the closing sentence about key custody is high-value. The single dense block is long and the mid-sentence list of returned artifacts is somewhat run-on, but each clause carries information.

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?

No output schema and no annotations, yet the description enumerates the response contents (approve + requestDeposit calldata, cohort epoch/cutoff, NAV share estimate, checks, cancelDeposit calldata). The remaining gap is parameter-level precision (usdg units, error semantics) for a 3-required-param quote 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?

Schema coverage is 0%, so the description must compensate. It does explain `vault` can be an address or a symbol like hhNVDA-CC and that `account` is the depositing account, but `usdg` is only described as 'USDG' — no units, decimals, or raw-vs-decimal convention — and account format is unspecified.

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?

Opens with a specific verb+resource: 'The unsigned calldata to deposit `usdg` USDG into `vault` ... for `account`'. It is clearly distinguished from siblings such as vault_redeem_quote, vault_claim_quote and vault_status by naming the exact operation (requestDeposit(0, usdg, account)) and the returned artifacts.

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 conveys the operating context well — the deposit is not instant, it prices at the cohort cutoff, and the caller must send txs with the owner key plus ETH for gas. But it never names an alternative sibling (e.g. vault_redeem_quote to exit, vault_status for balances) or states when NOT to call it, so routing is only implied.

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