snow_train_va_nlu · Serac MCP: Risk & Policy

WHAT IT DOES

What snow_train_va_nlu does on Serac

AI agents invoke snow_train_va_nlu to trigger actions in Serac. 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 snow_train_va_nlu needs a policy

This tool initiates an asynchronous training job on the ServiceNow platform. While not immediately destructive, it executes a significant computational operation whose effects depend on the model_id argument and the training data/configuration involved.

From the tool's definition Trigger training of a Virtual Agent NLU model...Training runs asynchronously on the platform; this call only starts the job.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snow_train_va_nlu Rate-limited

snow_train_va_nlu 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": {
    "snow_train_va_nlu": {
      "limits": [
        {
          "counter": "snow_train_va_nlu_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 Serac, so you can run agents against it safely.

FAQ

Questions about snow_train_va_nlu

What does the snow_train_va_nlu tool do? +

Trigger training of a Virtual Agent NLU model by model_id via /api/now/v1/va/models/{id}/train. Training runs asynchronously on the platform; this call only starts the job. It is categorised as a Execute tool in the Serac MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on snow_train_va_nlu? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_train_va_nlu: 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 Serac. Nothing to install.

What risk level is snow_train_va_nlu? +

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

Can I rate-limit snow_train_va_nlu? +

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

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

snow_train_va_nlu is provided by the Serac MCP server (serac-labs/serac). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

snow_train_va_nlu is one line of Serac's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →