Build an unsigned transaction to withdraw assets from an Arcadia account to the owner's wallet. Only the account owner can withdraw. Will revert if the account has debt and withdrawal would make it undercollateralized. Does not support max_uint256 — pass exact amounts from read_account_info. Acco...
Part of the Arcadia Finance server.
Free to start. No card required.
AI agents use write_account_withdraw to initiate financial transactions through Arcadia Finance. Financial operations involve real money and are irreversible once processed. PolicyLayer blocks financial tools by default, requiring explicit human approval with transaction-level limits to prevent unauthorised spending.
write_account_withdraw moves real money. Without a policy, an autonomous agent could initiate transactions that drain accounts or exceed budgets. PolicyLayer blocks financial tools by default, requiring human-in-the-loop approval with configurable spending limits per transaction and per time window.
Financial tools involve real money. Block by default and require explicit human approval before enabling.
{
"version": "1",
"default": "deny",
"tools": {
"write_account_withdraw": {
"deny_if": [
{
"conditions": [],
"on_deny": "Requires human approval."
}
]
}
}
}See the full Arcadia Finance policy for all 40 tools.
These attack patterns abuse exactly the kind of access write_account_withdraw gives an agent. Each links to the full case and the policy that stops it:
Other financial tools across the catalogue. The same approach applies to each: deny by default, or require human approval.
Build an unsigned transaction to withdraw assets from an Arcadia account to the owner's wallet. Only the account owner can withdraw. Will revert if the account has debt and withdrawal would make it undercollateralized. Does not support max_uint256 — pass exact amounts from read_account_info. Account version is auto-detected on-chain (override with account_version if needed).. It is categorised as a Financial tool in the Arcadia Finance MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Arcadia Finance MCP server in PolicyLayer and add a rule for write_account_withdraw: 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 Arcadia Finance. Nothing to install.
write_account_withdraw is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the write_account_withdraw 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.
Set action: deny in the PolicyLayer policy for write_account_withdraw. 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.
write_account_withdraw is provided by the Arcadia Finance MCP server (https://mcp.arcadia.finance/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 40 Arcadia Finance tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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