ssh_disconnect · SSH Read-Only MCP Server MCP: Risk & Policy

WHAT IT DOES

What ssh_disconnect does on SSH Read-Only MCP Server

AI agents invoke ssh_disconnect to trigger actions in SSH Read-Only 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 ssh_disconnect needs a policy

Disconnecting an SSH session is not a simple read or write; it triggers an external operation (tearing down the connection) that affects ongoing remote access. While the server is described as read-only for command execution, disconnecting is an operational action with real side effects (e.g., interrupting running processes or audit sessions).

From the tool's definition 'Disconnect from the remote machine' — terminates an active SSH connection, an external operational side-effect that cannot be trivially undone without reconnecting

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ssh_disconnect Rate-limited

ssh_disconnect 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": {
    "ssh_disconnect": {
      "limits": [
        {
          "counter": "ssh_disconnect_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 SSH Read-Only MCP Server, so you can run agents against it safely.

FAQ

Questions about ssh_disconnect

What does the ssh_disconnect tool do? +

Disconnect from the remote machine. It is categorised as a Execute tool in the SSH Read-Only 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 ssh_disconnect? +

Register the SSH Read-Only MCP Server MCP server in PolicyLayer and add a rule for ssh_disconnect: 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 SSH Read-Only MCP Server. Nothing to install.

What risk level is ssh_disconnect? +

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

Can I rate-limit ssh_disconnect? +

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

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

ssh_disconnect is provided by the SSH Read-Only MCP Server MCP server (kunwarmahen/ssh-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.