arc_deploy_runners_hybrid · ARC Config MCP Server MCP

WHAT IT DOES

What arc_deploy_runners_hybrid does on ARC Config MCP Server

AI agents invoke arc_deploy_runners_hybrid to trigger actions in ARC Config 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 arc_deploy_runners_hybrid needs a policy

This tool executes commands against Kubernetes clusters to deploy GitHub Actions runners. While it includes a review step (mitigating factor), it ultimately triggers irreversible operational changes in a live environment. This falls under Execute rather than Write because the effects are infrastructure-level deployments whose consequences depend on cluster state and configuration.

From the tool's definition Tool performs 'Deploy GitHub Actions runners' and 'applies to cluster' which are operational changes to Kubernetes infrastructure. Description states it 'applies to cluster' — a direct execution of infrastructure changes with external effects.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

arc_deploy_runners_hybrid Rate-limited

arc_deploy_runners_hybrid 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": {
    "arc_deploy_runners_hybrid": {
      "limits": [
        {
          "counter": "arc_deploy_runners_hybrid_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 ARC Config MCP Server, so you can run agents against it safely.

FAQ

Questions about arc_deploy_runners_hybrid

What does the arc_deploy_runners_hybrid tool do? +

Deploy GitHub Actions runners with configuration versioning. Generates config files in your repo, allows review, then optionally applies to cluster. It is categorised as a Execute tool in the ARC Config 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 arc_deploy_runners_hybrid? +

Register the ARC Config MCP Server MCP server in PolicyLayer and add a rule for arc_deploy_runners_hybrid: 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 ARC Config MCP Server. Nothing to install.

What risk level is arc_deploy_runners_hybrid? +

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

Can I rate-limit arc_deploy_runners_hybrid? +

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

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

arc_deploy_runners_hybrid is provided by the ARC Config MCP Server MCP server (tsviz/arc-config-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.