add_cpw_waveguide · Funky Junction MCP: Risk & Policy

WHAT IT DOES

What add_cpw_waveguide does on Funky Junction

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

WHY IT NEEDS A POLICY

Why add_cpw_waveguide needs a policy

This tool creates or adds a new transmission line component to a quantum circuit design. This is a reversible modification (the component can be removed or replaced), not an irreversible deletion. It does not execute external code, run simulations, move money, or have destructive effects. It falls squarely in the Write category as a design-time operation that modifies the circuit model.

From the tool's definition Tool name 'add_cpw_waveguide' and description 'Add a CPW (Coplanar Waveguide) transmission line between two points' indicate creation of a new component in a quantum circuit design.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_cpw_waveguide Rate-limited

add_cpw_waveguide 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": {
    "add_cpw_waveguide": {
      "limits": [
        {
          "counter": "add_cpw_waveguide_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 Funky Junction, so you can run agents against it safely.

FAQ

Questions about add_cpw_waveguide

What does the add_cpw_waveguide tool do? +

Add a CPW (Coplanar Waveguide) transmission line between two points. It is categorised as a Write tool in the Funky Junction MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_cpw_waveguide? +

Register the Funky Junction MCP server in PolicyLayer and add a rule for add_cpw_waveguide: 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 Funky Junction. Nothing to install.

What risk level is add_cpw_waveguide? +

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

Can I rate-limit add_cpw_waveguide? +

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

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

add_cpw_waveguide is provided by the Funky Junction MCP server (paulgoldschmidt/qsim-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.