tv_open_app · MCP Server Template MCP: Risk & Policy

WHAT IT DOES

What tv_open_app does on MCP Server Template

AI agents invoke tv_open_app to trigger actions in MCP Server Template. 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 tv_open_app needs a policy

This tool executes an action on an external device (smart TV), launching an application. It goes beyond reading or writing data — it triggers an operation whose effects depend on the arguments (which app to open). It is reversible (apps can be closed), so it doesn't qualify as Destructive, but it is an external execution trigger, placing it in the Execute category.

From the tool's definition 'Open a TV app by name or appId' — triggers an external operation on a physical/smart TV device

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tv_open_app Rate-limited

tv_open_app 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": {
    "tv_open_app": {
      "limits": [
        {
          "counter": "tv_open_app_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 MCP Server Template, so you can run agents against it safely.

FAQ

Questions about tv_open_app

What does the tv_open_app tool do? +

Open a TV app by name or appId (e.g.,. It is categorised as a Execute tool in the MCP Server Template MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on tv_open_app? +

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

What risk level is tv_open_app? +

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

Can I rate-limit tv_open_app? +

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

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

tv_open_app is provided by the MCP Server Template MCP server (kj14god/tvmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.