start_video_recording · React Native MCP: Risk & Policy

WHAT IT DOES

What start_video_recording does on React Native

AI agents invoke start_video_recording to trigger actions in React Native. 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 start_video_recording needs a policy

This tool executes a recording operation with real-world side effects. It initiates video capture of the React Native app's screen, which is an external operation that persists state until stopped. While not immediately destructive or financial, it triggers a system-level action whose consequences (what is recorded, where it's stored, data captured) depend on context and user intent.

From the tool's definition Tool performs 'Start screen recording' which triggers an external operation (video capture) whose effects depend on runtime context and subsequent calls (stop_video_recording). This is a stateful operation that initiates a system-level recording capability.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

start_video_recording Rate-limited

start_video_recording 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": {
    "start_video_recording": {
      "limits": [
        {
          "counter": "start_video_recording_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 React Native, so you can run agents against it safely.

FAQ

Questions about start_video_recording

What does the start_video_recording tool do? +

Start screen recording. Call stop_video_recording to save. It is categorised as a Execute tool in the React Native MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on start_video_recording? +

Register the React Native MCP server in PolicyLayer and add a rule for start_video_recording: 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 React Native. Nothing to install.

What risk level is start_video_recording? +

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

Can I rate-limit start_video_recording? +

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

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

start_video_recording is provided by the React Native MCP server (@ohah/react-native-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.