ssh_shell_close · SSH MCP Server MCP: Risk & Policy

WHAT IT DOES

What ssh_shell_close does on SSH MCP Server

AI agents use ssh_shell_close to create or update resources in SSH MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SSH MCP Server environment.

WHY IT NEEDS A POLICY

Why ssh_shell_close needs a policy

An AI agent can call ssh_shell_close faster than any human can review — one bad instruction and it creates or modifies resources in SSH MCP Server by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ssh_shell_close Rate-limited

ssh_shell_close stays usable, but capped — an agent stuck in a loop can't make hundreds of changes 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_shell_close": {
      "limits": [
        {
          "counter": "ssh_shell_close_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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 MCP Server, so you can run agents against it safely.

FAQ

Questions about ssh_shell_close

What does the ssh_shell_close tool do? +

Close an interactive shell session. It is categorised as a Write tool in the SSH MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on ssh_shell_close? +

Register the SSH MCP Server MCP server in PolicyLayer and add a rule for ssh_shell_close: 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 MCP Server. Nothing to install.

What risk level is ssh_shell_close? +

ssh_shell_close is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit ssh_shell_close? +

Yes. Add a rate_limit block to the ssh_shell_close 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_shell_close completely? +

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

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