deck_exec

Run an explicit shell command on the Steam Deck over SSH.

SERVERMcp Control Plane SOURCEalbertik322-sudo/mcp-control-plane

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-control-plane/deck-exec.md

WHAT IT DOES

What deck_exec does on Mcp Control Plane

AI agents invoke deck_exec to trigger actions in Mcp Control Plane. 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.

RISK

Why deck_exec is rated High

This tool executes arbitrary shell commands on a remote device (Steam Deck) with no apparent restrictions or sandboxing mentioned. Shell command execution is inherently Execute category.

From the tool's definition Tool description explicitly states 'Run an explicit shell command on the Steam Deck over SSH'. The term 'shell command' combined with 'run' indicates arbitrary code execution capability.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs deck_exec safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Control Plane, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For deck_exec, this is the rule to start with:

deck_exec Rate-limited

deck_exec 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": {
    "deck_exec": {
      "limits": [
        {
          "counter": "deck_exec_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Control Plane, apply this rule, and every deck_exec call is checked against it from then on.

FAQ

Questions about deck_exec

What does the deck_exec tool do? +

Run an explicit shell command on the Steam Deck over SSH. It is categorised as a Execute tool in the Mcp Control Plane MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on deck_exec? +

Register the Mcp Control Plane MCP server in PolicyLayer and add a rule for deck_exec: 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 Mcp Control Plane. Nothing to install.

What risk level is deck_exec? +

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

Can I rate-limit deck_exec? +

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

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

deck_exec is provided by the Mcp Control Plane MCP server (albertik322-sudo/mcp-control-plane). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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