press_key · Android ADB MCP Server MCP: Risk & Policy

WHAT IT DOES

What press_key does on Android ADB MCP Server

AI agents use press_key to create or update resources in Android ADB MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Android ADB MCP Server environment.

WHY IT NEEDS A POLICY

Why press_key needs a policy

An AI agent can call press_key faster than any human can review — one bad instruction and it creates or modifies resources in Android ADB MCP Server by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

press_key Rate-limited

press_key stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "press_key": {
      "limits": [
        {
          "counter": "press_key_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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 ADB MCP Server, so you can run agents against it safely.

FAQ

Questions about press_key

What does the press_key tool do? +

发送按键事件，支持 KEYCODE_HOME/BACK/ENTER 等或简写 HOME/BACK 或数字键码. It is categorised as a Write tool in the Android ADB MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on press_key? +

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

What risk level is press_key? +

press_key is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit press_key? +

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

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

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