app_key

THE RISK

Low Risk

Why app_key needs a policy

The description is empty and uninformative. Based on the sibling tool 'adb_key' and the server context of GUI automation and Android device interaction, 'app_key' likely simulates key presses on a desktop application, which would be Execute category. However, without confirmation, confidence is low and we default to Other while noting the likely Execute nature.

From the tool's definition Tool name is 'app_key' with an empty description; sibling tool 'adb_key' exists suggesting key input simulation, but no description confirms this.

Documented attack patterns abuse exactly the kind of access app_key gives an agent:

POLICY

How to control app_key

PolicyLayer is an MCP gateway — it sits between your AI agents and Claude Pascal MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for app_key:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "app_key": {
      "limits": [
        {
          "counter": "app_key_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

app_key gets a rate cap, and everything else on the server is denied unless you say otherwise.

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

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Claude Pascal MCP Server tools

Destructive paserver_remove paserver_remove Destructive sim_uninstall Uninstall an app from a simulator. Destructive sim_shutdown Shut down a simulator. Pass udid='booted' to stop all running ones. Destructive sim_terminate Terminate a running app by bundle identifier. Execute adb_launch_app adb_launch_app Execute adb_stop_app Force-stop an app on the Android device. Execute build_dproj build_dproj Execute compile_delphi_project compile_delphi_project

All 53 Claude Pascal MCP Server tools →

Other tools on other servers

Android Forensics ADB MCP Server generate_app_analysis_report Ethereum Tools add Math MCP Server complex_analysis_suite Crypto_MCP aes_encrypt

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about app_key

What does the app_key tool do? +

app_key. It is categorised as a Other tool in the Claude Pascal MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on app_key? +

Register the Claude Pascal MCP Server MCP server in PolicyLayer and add a rule for app_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 Claude Pascal MCP Server. Nothing to install.

What risk level is app_key? +

app_key is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit app_key? +

Yes. Add a rate_limit block to the app_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 app_key completely? +

Set action: deny in the PolicyLayer policy for app_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 app_key? +

app_key is provided by the Claude Pascal MCP Server MCP server (tina4stack/claude-pascal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Claude Pascal MCP Server tool call.

Start from Claude Pascal MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →