# KeyboardPress

KeyboardPress action, Press a key or key combination, like "Enter", "Tab", "Escape", or "Control+A", "Shift+Enter". Do not use this to type text.. Parameters: locate? (object) - The element to be clicked before pressing the key; keyName (string) - The key to be pressed. Use '+' for key combinations, e.g., 'Control+A', 'Shift+Enter'

Agent View of the PolicyLayer registry record for `KeyboardPress`. HTML page: https://policylayer.com/tools/android/keyboardpress

## Facts

- Tool: `KeyboardPress`
- Server: Android (`@midscene/android-mcp`) — https://policylayer.com/tools/android.md
- Install: `npx -y @midscene/android-mcp`
- Homepage: https://www.npmjs.com/package/@midscene/android-mcp
- Risk category: Execute (High risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 8 (1 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `locate` | object | no | The element to be clicked before pressing the key |
| `keyName` | string | yes | The key to be pressed. Use '+' for key combinations, e.g., 'Control+A', 'Shift+Enter' |
| `android.deviceId` | string | no | Android device ID (from adb devices) |
| `android.useScrcpy` | boolean | no | Enable scrcpy accelerated screenshots |
| `android.aiActContext` | string | no | Background knowledge passed to aiAct. Default: no extra context. |
| `android.waitAfterAction` | number | no | Wait time in milliseconds after each action execution. Default: 300ms. |
| `android.replanningCycleLimit` | integer | no | Maximum number of replanning cycles for aiAct. Default: model adapter default. |
| `android.screenshotShrinkFactor` | number | no | Screenshot shrink factor before sending images to AI. Default: 1; high values may reduce recognition quality, especially on mobile. |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "KeyboardPress",
    "arguments": {
      "keyName": "<keyName>"
    }
  }
}
```

## Why KeyboardPress is rated High

This tool triggers keyboard input actions on an Android device, which constitutes executing an external operation (simulated hardware input). It can trigger UI actions, shortcuts, or navigation with potentially broad effects depending on the key pressed (e.g., Control+A to select all, Enter to confirm dialogs).

From the tool's own definition: "'KeyboardPress action, Press a key or key combination' and 'keyName (string) - The key to be pressed. Use + for key combinations'"

Risk signals: High parameter count (13 properties)

## Use case

AI agents invoke KeyboardPress to trigger actions in Android. 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.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Android:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "KeyboardPress": {
      "limits": [
        {
          "counter": "keyboardpress_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Android (22)

- `ClearInput` — Destructive — https://policylayer.com/tools/android/clearinput.md
- `act` — Execute — https://policylayer.com/tools/android/act.md
- `android_connect` — Execute — https://policylayer.com/tools/android/android-connect.md
- `AndroidBackButton` — Execute — https://policylayer.com/tools/android/androidbackbutton.md
- `AndroidHomeButton` — Execute — https://policylayer.com/tools/android/androidhomebutton.md
- `AndroidRecentAppsButton` — Execute — https://policylayer.com/tools/android/androidrecentappsbutton.md
- `CursorMove` — Execute — https://policylayer.com/tools/android/cursormove.md
- `DoubleClick` — Execute — https://policylayer.com/tools/android/doubleclick.md
- `DragAndDrop` — Execute — https://policylayer.com/tools/android/draganddrop.md
- `Launch` — Execute — https://policylayer.com/tools/android/launch.md
- `LongPress` — Execute — https://policylayer.com/tools/android/longpress.md
- `Pinch` — Execute — https://policylayer.com/tools/android/pinch.md
- `PullGesture` — Execute — https://policylayer.com/tools/android/pullgesture.md
- `RunAdbShell` — Execute — https://policylayer.com/tools/android/runadbshell.md
- `Scroll` — Execute — https://policylayer.com/tools/android/scroll.md
- `Swipe` — Execute — https://policylayer.com/tools/android/swipe.md
- `Tap` — Execute — https://policylayer.com/tools/android/tap.md
- `Terminate` — Execute — https://policylayer.com/tools/android/terminate.md
- `take_screenshot` — Read — https://policylayer.com/tools/android/take-screenshot.md
- `android_disconnect` — Write — https://policylayer.com/tools/android/android-disconnect.md
- `assert` — Write — https://policylayer.com/tools/android/assert.md
- `Input` — Write — https://policylayer.com/tools/android/input.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=android · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/android