ows_sign_eip3009 · Execution Market MCP: Risk & Policy

WHAT IT DOES

What ows_sign_eip3009 does on Execution Market

AI agents use ows_sign_eip3009 to commit financial operations through Execution Market — usually the final step of a payment, billing, or trading workflow. A call moves real money.

WHY IT NEEDS A POLICY

Why ows_sign_eip3009 needs a policy

This tool cryptographically signs a payment authorization (EIP-3009 ReceiveWithAuthorization) for USDC transfers. It directly enables the movement of USDC funds into escrow without requiring gas, meaning a misuse could authorize unauthorized financial transfers.

From the tool's definition Sign an EIP-3009 ReceiveWithAuthorization for USDC — used for gasless escrow

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ows_sign_eip3009 Approval-gated

Any call to ows_sign_eip3009 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": {
    "ows_sign_eip3009": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Execution Market, so you can run agents against it safely.

FAQ

Questions about ows_sign_eip3009

What does the ows_sign_eip3009 tool do? +

Sign an EIP-3009 ReceiveWithAuthorization for USDC — used for gasless escrow. It is categorised as a Financial tool in the Execution Market MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on ows_sign_eip3009? +

Register the Execution Market MCP server in PolicyLayer and add a rule for ows_sign_eip3009: 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 Execution Market. Nothing to install.

What risk level is ows_sign_eip3009? +

ows_sign_eip3009 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 ows_sign_eip3009? +

Yes. Add a rate_limit block to the ows_sign_eip3009 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 ows_sign_eip3009 completely? +

Set action: deny in the PolicyLayer policy for ows_sign_eip3009. 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 ows_sign_eip3009? +

ows_sign_eip3009 is provided by the Execution Market MCP server (https://mcp.execution.market/mcp/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.