select_comp_lane

THE RISK

Low Risk

Why select_comp_lane needs a policy

With no description available, the tool name suggests a UI selection action (choosing a comp lane) in a DAW context, which would be an Execute or Read-level operation. However, given the empty description and that 'select' operations typically just change active state/view without creating, modifying, or deleting data, it most closely fits a low-severity action. Confidence is low due to lack of description.

From the tool's definition Tool description is empty; name 'select_comp_lane' suggests selecting a comping lane in REAPER DAW.

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

POLICY

How to control select_comp_lane

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "select_comp_lane": {
      "limits": [
        {
          "counter": "select_comp_lane_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

select_comp_lane gets a rate cap, and everything else on the server is denied unless you say otherwise.

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

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about select_comp_lane

What does the select_comp_lane tool do? +

select_comp_lane. It is categorised as a Other tool in the Reaper MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on select_comp_lane? +

Register the Reaper MCP server in PolicyLayer and add a rule for select_comp_lane: 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 Reaper. Nothing to install.

What risk level is select_comp_lane? +

select_comp_lane is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit select_comp_lane? +

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

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

select_comp_lane is provided by the Reaper MCP server (twelvetake-studios/reaper-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Reaper tool call.

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

CHECK YOUR STACK →