dex_swap

THE RISK

Critical Risk

Why dex_swap needs a policy

A DEX swap directly exchanges one cryptocurrency asset for another, committing financial value. This is a Financial category action. Misuse could result in loss of funds through unfavorable trades, sandwich attacks, or draining a wallet. The server context (multi-chain crypto operations, spending limits, human approval mechanisms) confirms this is a real financial operation.

From the tool's definition 'Execute DEX swap' - performs a decentralized exchange swap, which is a financial transaction moving crypto assets

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

POLICY

How to control dex_swap

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

policy.json

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

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

Create a free account and register Waiaas — 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 Waiaas tools

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All 126 Waiaas tools →

Financial tools on other servers

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Go deeper

Critical-risk tools in Waiaas → 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 dex_swap

What does the dex_swap tool do? +

Execute DEX swap via D. It is categorised as a Financial tool in the Waiaas MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on dex_swap? +

Register the Waiaas MCP server in PolicyLayer and add a rule for 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 Waiaas. Nothing to install.

What risk level is dex_swap? +

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 dex_swap? +

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

Set action: deny in the PolicyLayer policy for 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 dex_swap? +

dex_swap is provided by the Waiaas MCP server (minhoyoo-iotrust/waiaas). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Waiaas tool call.

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

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