create_emulator · MCPEmulate MCP: Risk & Policy

WHAT IT DOES

What create_emulator does on MCPEmulate

AI agents invoke create_emulator to trigger actions in MCPEmulate. 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 create_emulator needs a policy

Creating an emulator session initializes an execution environment for running arbitrary CPU instructions across architectures (x86, ARM, RISC-V). While it doesn't immediately run code, it sets up infrastructure for code execution and is a prerequisite for executing arbitrary machine code.

From the tool's definition Create a new CPU emulation session

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_emulator Rate-limited

create_emulator 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": {
    "create_emulator": {
      "limits": [
        {
          "counter": "create_emulator_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 MCPEmulate, so you can run agents against it safely.

FAQ

Questions about create_emulator

What does the create_emulator tool do? +

Create a new CPU emulation session. It is categorised as a Execute tool in the MCPEmulate MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on create_emulator? +

Register the MCPEmulate MCP server in PolicyLayer and add a rule for create_emulator: 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 MCPEmulate. Nothing to install.

What risk level is create_emulator? +

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

Can I rate-limit create_emulator? +

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

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

create_emulator is provided by the MCPEmulate MCP server (labguy94/mcpemulate). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.