android_start_scrcpy_stream · Android MCP Server MCP

WHAT IT DOES

What android_start_scrcpy_stream does on Android MCP Server

AI agents invoke android_start_scrcpy_stream to trigger actions in Android 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 android_start_scrcpy_stream needs a policy

While frame capture itself is observational, actively *starting* a streaming service is an Execute action—it initiates and maintains an external operation whose continuation depends on the invocation. Combined with the broader context of ADB control tools that can manipulate device state, an agent could use this to monitor device activity persistently.

From the tool's definition Tool starts a streaming service ('Start scrcpy streaming') that initiates continuous frame capture from an Android device.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

android_start_scrcpy_stream Rate-limited

android_start_scrcpy_stream 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": {
    "android_start_scrcpy_stream": {
      "limits": [
        {
          "counter": "android_start_scrcpy_stream_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 Android MCP Server, so you can run agents against it safely.

FAQ

Questions about android_start_scrcpy_stream

What does the android_start_scrcpy_stream tool do? +

Start scrcpy streaming for continuous fast frame capture (requires scrcpy installed). It is categorised as a Execute tool in the Android 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 android_start_scrcpy_stream? +

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

What risk level is android_start_scrcpy_stream? +

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

Can I rate-limit android_start_scrcpy_stream? +

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

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

android_start_scrcpy_stream is provided by the Android MCP Server MCP server (jduartedj/android-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.