amm-vote

THE RISK

High Risk

Why amm-vote needs a policy

This tool submits a vote transaction to the XRP Ledger to influence AMM parameters (e.g., trading fees). It triggers an external on-chain operation with real effects on a live AMM pool. While it doesn't directly move funds or delete data, it executes a ledger transaction that can alter AMM behavior affecting all participants.

From the tool's definition Vote on parameters for an Automated Market Maker (AMM)

Documented attack patterns abuse exactly the kind of access amm-vote gives an agent:

POLICY

How to control amm-vote

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "amm-vote": {
      "limits": [
        {
          "counter": "amm-vote_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

amm-vote stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

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

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Go deeper

High-risk tools in Xrpl mcp → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-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.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about amm-vote

What does the amm-vote tool do? +

Vote on parameters for an Automated Market Maker (AMM). It is categorised as a Execute tool in the Xrpl mcp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on amm-vote? +

Register the Xrpl MCP server in PolicyLayer and add a rule for amm-vote: 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 Xrpl mcp. Nothing to install.

What risk level is amm-vote? +

amm-vote is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit amm-vote? +

Yes. Add a rate_limit block to the amm-vote 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 amm-vote completely? +

Set action: deny in the PolicyLayer policy for amm-vote. 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 amm-vote? +

amm-vote is provided by the Xrpl MCP server (romthpt/mcp-xrpl). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Xrpl mcp tool call.

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

CHECK YOUR STACK →