press-key-code

THE RISK

High Risk

This tool triggers a key press action on an Android device, which is an external operation that can interact with the device UI, trigger actions in apps, or navigate the device. It has side effects that depend on which key code is pressed (e.g., HOME, BACK, POWER, or text input keys), making it an Execute-category tool with medium severity since misuse could disrupt app state or device interaction flows.

From the tool's definition Press an Android key code

Documented attack patterns abuse exactly the kind of access press-key-code gives an agent:

HOW TO CONTROL PRESS-KEY-CODE

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Appium Server, and nothing reaches the server without passing your rules. This is the rule we recommend for press-key-code:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "press-key-code": {
      "limits": [
        {
          "counter": "press-key-code_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

press-key-code 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.

Create a free account and register MCP Appium Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All 110 MCP Appium Server tools →

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Go deeper

High-risk tools in MCP Appium Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
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MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the press-key-code tool do? +

Press an Android key code. It is categorised as a Execute tool in the MCP Appium 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 press-key-code? +

Register the MCP Appium Server MCP server in PolicyLayer and add a rule for press-key-code: 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 MCP Appium Server. Nothing to install.

What risk level is press-key-code? +

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

Can I rate-limit press-key-code? +

Yes. Add a rate_limit block to the press-key-code 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-code completely? +

Set action: deny in the PolicyLayer policy for press-key-code. 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-code? +

press-key-code is provided by the MCP Appium Server MCP server (rahulec08/appium-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Appium Server tool call.

Deterministic rules across all 110 MCP Appium Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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// WHAT PRESS-KEY-CODE ON MCP APPIUM SERVER DOES

// THE RISK

// HOW TO CONTROL PRESS-KEY-CODE

// EXPLORE