roku_launch · Roku MCP Server MCP: Risk & Policy

WHAT IT DOES

What roku_launch does on Roku MCP Server

AI agents invoke roku_launch to trigger actions in Roku MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why roku_launch needs a policy

Launching/restarting applications is an Execute action—it runs code/operations on an external device whose effects depend on arguments and cannot be purely read-only. While not destructive, write-based, or financial, it actively triggers side effects on the target device.

From the tool's definition Tool 'roku_launch' performs POST action to '/launch/{appId}' endpoint, which triggers execution of an application on a Roku device.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

roku_launch Rate-limited

roku_launch 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "roku_launch": {
      "limits": [
        {
          "counter": "roku_launch_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about roku_launch

What does the roku_launch tool do? +

Launch or restart an app on the Roku device. Roku API: POST http://{host}:8060/launch/{appId}?{params} Use appId=. It is categorised as a Execute tool in the Roku MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on roku_launch? +

Register the Roku MCP Server MCP server in PolicyLayer and add a rule for roku_launch: 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 Roku MCP Server. Nothing to install.

What risk level is roku_launch? +

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

Can I rate-limit roku_launch? +

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

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

roku_launch is provided by the Roku MCP Server MCP server (maskelog/roku-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.