roku_keypress · Roku MCP Server MCP: Risk & Policy

WHAT IT DOES

What roku_keypress does on Roku MCP Server

AI agents invoke roku_keypress 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_keypress needs a policy

This tool sends key press commands to an external Roku device via HTTP POST, triggering real device actions (navigation, text input, power control, volume changes). It executes external operations on a physical device. The PowerOff key could be disruptive, but overall the blast radius is medium since misuse is limited to controlling a single Roku device rather than affecting data or financial systems.

From the tool's definition Send a remote control key press to the Roku device. POST http://{host}:8060/keypress/{key}

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

roku_keypress Rate-limited

roku_keypress 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_keypress": {
      "limits": [
        {
          "counter": "roku_keypress_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_keypress

What does the roku_keypress tool do? +

Send a remote control key press to the Roku device. Roku API: POST http://{host}:8060/keypress/{key} Available keys: Home, Rev, Fwd, Play, Select, Left, Right, Down, Up, Back, InstantReplay, Info, Backspace, Search, Enter, VolumeDown, VolumeMute, VolumeUp, PowerOff, ChannelUp, ChannelDown, Lit_{character} (for text input, e.g., Lit_a, Lit_1) Ref: developer.roku.com/docs/developer-program/debugging/external-control-api.md. 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_keypress? +

Register the Roku MCP Server MCP server in PolicyLayer and add a rule for roku_keypress: 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_keypress? +

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

Can I rate-limit roku_keypress? +

Yes. Add a rate_limit block to the roku_keypress 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_keypress completely? +

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

roku_keypress 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.