nia_queue_submit · Nia Link MCP: Risk & Policy

WHAT IT DOES

What nia_queue_submit does on Nia Link

AI agents invoke nia_queue_submit to trigger actions in Nia Link. 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 nia_queue_submit needs a policy

Submitting a queue task initiates an external web scraping operation asynchronously. This goes beyond a simple read because it dispatches work to a background system and interacts with live external websites. The blast radius is medium: misuse could cause unwanted web requests, scraping of sensitive pages, or abuse of external services, but it does not directly modify or destroy data.

From the tool's definition 'Submit an asynchronous scrape task to the background queue' and 'Returns a task_id for polling status' — triggers an external background operation (scraping a live web page) whose effects depend on the URL/arguments provided

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

nia_queue_submit Rate-limited

nia_queue_submit 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": {
    "nia_queue_submit": {
      "limits": [
        {
          "counter": "nia_queue_submit_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 Nia Link, so you can run agents against it safely.

FAQ

Questions about nia_queue_submit

What does the nia_queue_submit tool do? +

Submit an asynchronous scrape task to the background queue. Returns a task_id for polling status with the nia_queue_status tool. It is categorised as a Execute tool in the Nia Link MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on nia_queue_submit? +

Register the Nia Link MCP server in PolicyLayer and add a rule for nia_queue_submit: 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 Nia Link. Nothing to install.

What risk level is nia_queue_submit? +

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

Can I rate-limit nia_queue_submit? +

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

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

nia_queue_submit is provided by the Nia Link MCP server (nia-atavism/nia-link). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.