ref_finance_execute_swap

THE RISK

Critical Risk

Why ref_finance_execute_swap needs a policy

The tool name contains 'execute_swap' which indicates it performs a financial swap operation (exchanging tokens/assets) on the Ref Finance decentralized exchange on the NEAR blockchain. Swaps are financial transactions that move assets and cannot be trivially reversed. The description is empty, which lowers confidence slightly, but the naming convention is unambiguous.

From the tool's definition Tool name 'ref_finance_execute_swap' — 'execute_swap' strongly implies executing a token swap on Ref Finance, a DEX on NEAR blockchain

Documented attack patterns abuse exactly the kind of access ref_finance_execute_swap gives an agent:

POLICY

How to control ref_finance_execute_swap

PolicyLayer is an MCP gateway — it sits between your AI agents and NEAR MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for ref_finance_execute_swap:

policy.json

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

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

Create a free account and register NEAR MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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FAQ

Questions about ref_finance_execute_swap

What does the ref_finance_execute_swap tool do? +

ref_finance_execute_swap. It is categorised as a Financial tool in the NEAR MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on ref_finance_execute_swap? +

Register the NEAR MCP server in PolicyLayer and add a rule for ref_finance_execute_swap: 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 NEAR MCP. Nothing to install.

What risk level is ref_finance_execute_swap? +

ref_finance_execute_swap 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 ref_finance_execute_swap? +

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

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

ref_finance_execute_swap is provided by the NEAR MCP server (nearai/near-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every NEAR MCP tool call.

Start from NEAR MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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