ultimate_version · Commodore 64 Ultimate MCP Server MCP

WHAT IT DOES

What ultimate_version does on Commodore 64 Ultimate MCP Server

AI agents call ultimate_version to retrieve information from Commodore 64 Ultimate MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why ultimate_version needs a policy

This tool simply queries and returns the current version string of the Ultimate hardware device. It is a read-only operation with no side effects, state changes, or control over hardware operations. Even if misused by an AI agent, retrieving version information poses minimal security risk.

From the tool's definition Tool name and description indicate it retrieves version information ("Get the current version") with no modification, creation, deletion, or execution capabilities.

Documented attack patterns abuse exactly the kind of access ultimate_version gives an agent:

POLICY

How to control ultimate_version

PolicyLayer is an MCP gateway — it sits between your AI agents and Commodore 64 Ultimate MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for ultimate_version:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ultimate_version": {}
  }
}

ultimate_version is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Commodore 64 Ultimate MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Commodore 64 Ultimate MCP Server tools

Destructive ultimate_reset_config Reset configuration to factory defaults Destructive ultimate_power_off Power off the Ultimate device (hardware power off) Execute ultimate_reset_machine Reset the C64 machine (soft reset) Execute ultimate_soft_reset Perform a soft reset (load empty program) Execute ultimate_run_cartridge Load and run a cartridge file Execute ultimate_run_prg_binary Upload and run a PRG file. Accepts file path, base64-encoded binary data, or URL to downlo Execute ultimate_run_program Load and run a program on the C64 Execute ultimate_start_stream Start a data stream (U64 only: video, audio, debug)

All 39 Commodore 64 Ultimate MCP Server tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about ultimate_version

What does the ultimate_version tool do? +

Get the current version of the Ultimate. It is categorised as a Read tool in the Commodore 64 Ultimate MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on ultimate_version? +

Register the Commodore 64 Ultimate MCP Server MCP server in PolicyLayer and add a rule for ultimate_version: 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 Commodore 64 Ultimate MCP Server. Nothing to install.

What risk level is ultimate_version? +

ultimate_version is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit ultimate_version? +

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

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

ultimate_version is provided by the Commodore 64 Ultimate MCP Server MCP server (martijn-devrev/ultimate64mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Commodore 64 Ultimate MCP Server tool call.

Start from Commodore 64 Ultimate MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →

Free to start. No card required.

39 Commodore 64 Ultimate MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.