submit_job · Ns Hpc MCP: Risk & Policy

WHAT IT DOES

What submit_job does on Ns Hpc

AI agents invoke submit_job to trigger actions in Ns Hpc. 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 submit_job needs a policy

This tool submits arbitrary commands for execution on HPC clusters (locally or via Slurm). It runs external operations whose effects depend on arguments, making it Execute category. Severity is high because an AI agent could submit resource-intensive, long-running, or harmful jobs on shared HPC infrastructure with potentially wide blast radius.

From the tool's definition Submit a command as an async (non-blocking) job

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

submit_job Rate-limited

submit_job 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": {
    "submit_job": {
      "limits": [
        {
          "counter": "submit_job_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 Ns Hpc, so you can run agents against it safely.

FAQ

Questions about submit_job

What does the submit_job tool do? +

Submit a command as an async (non-blocking) job. It is categorised as a Execute tool in the Ns Hpc MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on submit_job? +

Register the Ns Hpc MCP server in PolicyLayer and add a rule for submit_job: 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 Ns Hpc. Nothing to install.

What risk level is submit_job? +

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

Can I rate-limit submit_job? +

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

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

submit_job is provided by the Ns Hpc MCP server (li-yq/namespaced-hpc-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.