ensure_service · Mcp Ssh Tool MCP: Risk & Policy

WHAT IT DOES

What ensure_service does on Mcp Ssh Tool

AI agents invoke ensure_service to trigger actions in Mcp Ssh Tool. 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 ensure_service needs a policy

Controlling system services (start/stop/restart/enable/disable) is an Execute-level action with high blast radius: an AI agent could stop critical services, cause outages, or enable unauthorized services on remote machines. The SSH context amplifies risk as these are remote operations.

From the tool's definition 'Ensures a service is in the desired state' — this tool starts, stops, restarts, or otherwise controls system services on remote SSH hosts

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ensure_service Rate-limited

ensure_service 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": {
    "ensure_service": {
      "limits": [
        {
          "counter": "ensure_service_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 Mcp Ssh Tool, so you can run agents against it safely.

FAQ

Questions about ensure_service

What does the ensure_service tool do? +

Ensures a service is in the desired state. It is categorised as a Execute tool in the Mcp Ssh Tool MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on ensure_service? +

Register the Mcp Ssh Tool MCP server in PolicyLayer and add a rule for ensure_service: 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 Ssh Tool. Nothing to install.

What risk level is ensure_service? +

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

Can I rate-limit ensure_service? +

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

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

ensure_service is provided by the Mcp Ssh Tool MCP server (skot/mcp-ssh-tool). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.