create_asset · Lunch Money MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_asset does on Lunch Money MCP Server

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

WHY IT NEEDS A POLICY

Why create_asset needs a policy

This tool creates a new financial asset or account entry in Lunch Money. It writes new data but does not move money or irreversibly delete anything. However, misuse could clutter or corrupt the user's financial account structure, warranting medium severity.

From the tool's definition Create a new asset/account

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_asset Rate-limited

create_asset 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_asset": {
      "limits": [
        {
          "counter": "create_asset_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 Lunch Money MCP Server, so you can run agents against it safely.

FAQ

Questions about create_asset

What does the create_asset tool do? +

Create a new asset/account. It is categorised as a Write tool in the Lunch Money MCP Server 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_asset? +

Register the Lunch Money MCP Server MCP server in PolicyLayer and add a rule for create_asset: 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 Lunch Money MCP Server. Nothing to install.

What risk level is create_asset? +

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

Can I rate-limit create_asset? +

Yes. Add a rate_limit block to the create_asset 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_asset completely? +

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

create_asset is provided by the Lunch Money MCP Server MCP server (matiasl13/lunchmoney-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.