execute_dex_swap

THE RISK

Critical Risk

Why execute_dex_swap needs a policy

This tool performs an actual on-chain financial transaction on Ethereum Mainnet via Uniswap V2, moving real cryptocurrency assets. It is irreversible once broadcast to the blockchain, making it both Financial and effectively Destructive in nature. Financial is the most severe applicable category. Misuse by an AI agent could result in significant financial loss with no possibility of reversal.

From the tool's definition Executes a real on-chain swap using Uniswap V2 Router on Ethereum Mainnet

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

POLICY

How to control execute_dex_swap

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

policy.json

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

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

Create a free account and register Crypto Multi-MCP Hub — 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

Related tools and policies

More Crypto Multi-MCP Hub tools

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Go deeper

Critical-risk tools in Crypto Multi-MCP Hub → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about execute_dex_swap

What does the execute_dex_swap tool do? +

Executes a real on-chain swap using Uniswap V2 Router on Ethereum Mainnet. It is categorised as a Financial tool in the Crypto Multi-MCP Hub MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on execute_dex_swap? +

Register the Crypto Multi-MCP Hub MCP server in PolicyLayer and add a rule for execute_dex_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 Crypto Multi-MCP Hub. Nothing to install.

What risk level is execute_dex_swap? +

execute_dex_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 execute_dex_swap? +

Yes. Add a rate_limit block to the execute_dex_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 execute_dex_swap completely? +

Set action: deny in the PolicyLayer policy for execute_dex_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 execute_dex_swap? +

execute_dex_swap is provided by the Crypto Multi-MCP Hub MCP server (pellenybe/crypto-mcp-server---by-corax-colab). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Crypto Multi-MCP Hub tool call.

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

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