swipe · App Screen MCP: Risk & Policy

WHAT IT DOES

What swipe does on App Screen

AI agents invoke swipe to trigger actions in App Screen. 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 swipe needs a policy

Swipe executes a UI gesture action on the iOS Simulator, triggering external operations (navigation, scrolling, dismissals) whose effects depend on the coordinates and context. It is not purely reading data, and its effects are driven by runtime arguments, placing it firmly in Execute.

From the tool's definition Perform a swipe gesture from one coordinate to another

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

swipe Rate-limited

swipe 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": {
    "swipe": {
      "limits": [
        {
          "counter": "swipe_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 App Screen, so you can run agents against it safely.

FAQ

Questions about swipe

What does the swipe tool do? +

Perform a swipe gesture from one coordinate to another. It is categorised as a Execute tool in the App Screen MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on swipe? +

Register the App Screen MCP server in PolicyLayer and add a rule for swipe: 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 App Screen. Nothing to install.

What risk level is swipe? +

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

Can I rate-limit swipe? +

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

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

swipe is provided by the App Screen MCP server (xmuweili/app-screen-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.