ssh_send_stdin · Mcp Ssh Live MCP: Risk & Policy

WHAT IT DOES

What ssh_send_stdin does on Mcp Ssh Live

AI agents invoke ssh_send_stdin to trigger actions in Mcp Ssh Live. 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_send_stdin needs a policy

Sending stdin to a remote process can influence arbitrary command execution on a remote system. The server context makes clear this is an SSH execution environment. While the description is empty (lowering confidence), sibling tools like ssh_exec, ssh_run_persistent, and ssh_signal confirm this server runs remote commands.

From the tool's definition Tool name 'ssh_send_stdin' on a server described as enabling 'spawning long-running remote commands with live line-by-line output, signal handling, stdin input' — the tool likely sends input to a running remote process via stdin.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ssh_send_stdin Rate-limited

ssh_send_stdin 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_send_stdin": {
      "limits": [
        {
          "counter": "ssh_send_stdin_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 Live, so you can run agents against it safely.

FAQ

Questions about ssh_send_stdin

What does the ssh_send_stdin tool do? +

ssh_send_stdin. It is categorised as a Execute tool in the Mcp Ssh Live 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_send_stdin? +

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

What risk level is ssh_send_stdin? +

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

Can I rate-limit ssh_send_stdin? +

Yes. Add a rate_limit block to the ssh_send_stdin 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_send_stdin completely? +

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

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