runTo · VICE C64 Emulator MCP Server MCP: Risk & Policy

WHAT IT DOES

What runTo does on VICE C64 Emulator MCP Server

AI agents invoke runTo to trigger actions in VICE C64 Emulator MCP Server. 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 runTo needs a policy

This tool executes code within the VICE emulator by advancing program execution to a specified memory address. While it does not directly execute arbitrary code, it triggers emulation execution whose behavioral outcome depends entirely on what code resides at the target address and program state.

From the tool's definition Tool description states 'Run execution until a specific address is reached' and 'Sets a temporary breakpoint at the target address and continues execution.' This explicitly triggers external operations (emulator execution control) whose effects depend on the…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

runTo Rate-limited

runTo 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": {
    "runTo": {
      "limits": [
        {
          "counter": "runto_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 VICE C64 Emulator MCP Server, so you can run agents against it safely.

FAQ

Questions about runTo

What does the runTo tool do? +

Run execution until a specific address is reached. Sets a temporary breakpoint at the target address and continues execution. The breakpoint is automatically deleted when hit. Use for: -. It is categorised as a Execute tool in the VICE C64 Emulator MCP 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 runTo? +

Register the VICE C64 Emulator MCP Server MCP server in PolicyLayer and add a rule for runTo: 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 VICE C64 Emulator MCP Server. Nothing to install.

What risk level is runTo? +

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

Can I rate-limit runTo? +

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

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

runTo is provided by the VICE C64 Emulator MCP Server MCP server (simen/vice-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.