key_sequence · Sl Test MCP: Risk & Policy

WHAT IT DOES

What key_sequence does on Sl Test

AI agents invoke key_sequence to trigger actions in Sl Test. 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 key_sequence needs a policy

This tool triggers external operations (key press/release events) on a simulator, which constitutes executing input actions that can drive application behavior. The effects depend on which keys are pressed and the current state of the simulator, making it an Execute-category tool. Severity is medium as misuse could drive unintended application workflows within the simulator environment.

From the tool's definition Press a sequence of keys by their keycodes on the simulator. Each key will be pressed and released before the next key.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

key_sequence Rate-limited

key_sequence 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": {
    "key_sequence": {
      "limits": [
        {
          "counter": "key_sequence_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 Sl Test, so you can run agents against it safely.

FAQ

Questions about key_sequence

What does the key_sequence tool do? +

Press a sequence of keys by their keycodes on the simulator. Each key will be pressed and released before the next key. It is categorised as a Execute tool in the Sl Test MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on key_sequence? +

Register the Sl Test MCP server in PolicyLayer and add a rule for key_sequence: 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 Sl Test. Nothing to install.

What risk level is key_sequence? +

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

Can I rate-limit key_sequence? +

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

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

key_sequence is provided by the Sl Test MCP server (sampsonky/xcodebuildmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.