ssh_cancel_command

THE RISK

High Risk

Why ssh_cancel_command needs a policy

Cancelling a running command is an active operation that interrupts/terminates execution on a remote system. It spans Execute (interfering with a running process) rather than Destructive (no data deletion) or Read. Misuse could disrupt legitimate operations on the remote host, giving it medium severity.

From the tool's definition Cancel currently running MCP command for specified SSH session

Documented attack patterns abuse exactly the kind of access ssh_cancel_command gives an agent:

POLICY

How to control ssh_cancel_command

PolicyLayer is an MCP gateway — it sits between your AI agents and SSH MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for ssh_cancel_command:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ssh_cancel_command": {
      "limits": [
        {
          "counter": "ssh_cancel_command_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

ssh_cancel_command 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.

Create a free account and register SSH MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More SSH MCP Server tools

Destructive ssh_disconnect Disconnect an SSH session Execute ssh_exec Execute command on remote server via SSH Execute ssh_poll_task Check status of background task in SSH session Execute ssh_connect Establish SSH connection to a remote server Read ssh_version Get SSH MCP server version and build information Read ssh_get_monitoring_url Get the monitoring URL for an SSH session Read ssh_list_sessions List all active SSH sessions

All 8 SSH MCP Server tools →

Execute tools on other servers

Android Forensics ADB MCP Server adb_shell_command EMBA-MCP run_emba_scan Frida Game Hacking MCP remove_breakpoint Procmon request_elevation

Go deeper

High-risk tools in SSH MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about ssh_cancel_command

What does the ssh_cancel_command tool do? +

Cancel currently running MCP command for specified SSH session. It is categorised as a Execute tool in the SSH 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_cancel_command? +

Register the SSH MCP Server MCP server in PolicyLayer and add a rule for ssh_cancel_command: 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_cancel_command? +

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

Can I rate-limit ssh_cancel_command? +

Yes. Add a rate_limit block to the ssh_cancel_command 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_cancel_command completely? +

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

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

Enforce policy on every SSH MCP Server tool call.

Start from SSH MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →