create_mpc_wallet · Tenzro Ledger MCP: Risk & Policy

WHAT IT DOES

What create_mpc_wallet does on Tenzro Ledger MCP

AI agents use create_mpc_wallet to create or update resources in Tenzro Ledger MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Tenzro Ledger MCP environment.

WHY IT NEEDS A POLICY

Why create_mpc_wallet needs a policy

This tool creates new cryptographic wallet infrastructure with specified threshold parameters and share distribution. While not destructive, it irreversibly commits wallet creation data and key material to the ledger system.

From the tool's definition Tool creates a threshold wallet using FROST-Ed25519 protocol (RFC 9591). The description uses 'Create' and explicitly states it generates cryptographic shares for a new wallet, which is a reversible data creation operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_mpc_wallet Rate-limited

create_mpc_wallet stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_mpc_wallet": {
      "limits": [
        {
          "counter": "create_mpc_wallet_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about create_mpc_wallet

What does the create_mpc_wallet tool do? +

Create a FROST-Ed25519 (RFC 9591) threshold wallet with the specified threshold and share count. It is categorised as a Write tool in the Tenzro Ledger MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_mpc_wallet? +

Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for create_mpc_wallet: 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 Tenzro Ledger MCP. Nothing to install.

What risk level is create_mpc_wallet? +

create_mpc_wallet is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_mpc_wallet? +

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

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

create_mpc_wallet is provided by the Tenzro Ledger MCP server (https://canton-mcp.tenzro.network/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.