build_withdraw_tx

Build the transaction steps required to withdraw vault shares from an ATV vault and receive an output token.

SERVERAtv SOURCEaarna-ai/atv

Critical RISK CLASS

Category Financial

Parameters 60 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aarna-ai-atv/build-withdraw-tx.md

WHAT IT DOES

What build_withdraw_tx does on Atv

AI agents use build_withdraw_tx to commit financial operations through Atv, usually the final step of a payment, billing, or trading workflow. A call moves real money.

Parameter	Type	Required	Description
`simulate`	string	—	Pass 'true' to include a gas estimate in the response
`slippage`	string	—	Slippage tolerance as a percentage, e.g. '0.5'
`userAddress`	string	—	EVM address of the withdrawer
`vaultAddress`	string	—	Vault contract address
`oTokenAddress`	string	—	Output token address to receive
`sharesToWithdraw`	string	—	Human-readable share amount to withdraw, e.g. '100'

Parameters from the server's own tool schema.

RISK

Why build_withdraw_tx is rated Critical

This tool constructs transactions that move financial assets (vault shares) out of yield vaults and convert them to output tokens on Ethereum/Base. Withdrawing vault shares is a financial operation that commits to moving funds. Combined with the server context of 'tokenized yield vaults' and sibling tools like build_deposit_tx and build_stake_tx, this clearly falls in the Financial category.

From the tool's definition "Build the transaction steps required to withdraw vault shares from an ATV vault and receive an output token"

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs build_withdraw_tx safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Atv, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For build_withdraw_tx, this is the rule to start with:

build_withdraw_tx Approval-gated

Any call to build_withdraw_tx is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "build_withdraw_tx": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Atv, apply this rule, and every build_withdraw_tx call is checked against it from then on.

FAQ

Questions about build_withdraw_tx

What does the build_withdraw_tx tool do? +

Build the transaction steps required to withdraw vault shares from an ATV vault and receive an output token. It is categorised as a Financial tool in the Atv MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

What parameters does build_withdraw_tx accept? +

build_withdraw_tx accepts 6 parameters: simulate, slippage, userAddress, vaultAddress, oTokenAddress, sharesToWithdraw. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on build_withdraw_tx? +

Register the Atv MCP server in PolicyLayer and add a rule for build_withdraw_tx: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Atv. Nothing to install.

What risk level is build_withdraw_tx? +

build_withdraw_tx is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit build_withdraw_tx? +

Yes. Add a rate_limit block to the build_withdraw_tx rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block build_withdraw_tx completely? +

Set action: deny in the PolicyLayer policy for build_withdraw_tx. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides build_withdraw_tx? +

build_withdraw_tx is provided by the Atv MCP server (aarna-ai/atv). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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