loadProgram

Server VICE C64 Emulator MCP Server simen/vice-mcp

Category Execute

Risk class High

Parameters 00 required

WHAT IT DOES

What loadProgram does on VICE C64 Emulator MCP Server

AI agents invoke loadProgram 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 loadProgram needs a policy

This tool loads arbitrary program files (PRG, D64, T64, etc.) into an emulator and by default immediately executes them. The act of running arbitrary code in the emulator context qualifies as Execute.

From the tool's definition 'Load and optionally run a program file' and 'run: If true (default), starts execution after loading'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

loadProgram Rate-limited

loadProgram 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": {
    "loadProgram": {
      "limits": [
        {
          "counter": "loadprogram_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 loadProgram

What does the loadProgram tool do? +

Load and optionally run a program file. Supports PRG, D64, T64, and other C64 file formats. For disk images, can specify which file to run. Options: - run: If true (default), starts execution after loading - fileIndex: For disk images, which file to load (0 = first) Related tools: reset, status, setBreakpoint. 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 loadProgram? +

Register the VICE C64 Emulator MCP Server MCP server in PolicyLayer and add a rule for loadProgram: 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 loadProgram? +

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

Can I rate-limit loadProgram? +

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

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

loadProgram 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.