snow_create_list_layout · Serac MCP: Risk & Policy

WHAT IT DOES

What snow_create_list_layout does on Serac

AI agents use snow_create_list_layout to create or update resources in Serac — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Serac environment.

WHY IT NEEDS A POLICY

Why snow_create_list_layout needs a policy

This tool creates new list layout configurations (a form of UI/structural configuration) in ServiceNow tables. Creation of configurations is a reversible write operation. Severity is high because misconfigured list layouts could affect enterprise user experience across multiple users accessing that table, and could be used to obscure critical data columns or inject visual confusion into operational dashboards.

From the tool's definition Tool name 'snow_create_list_layout' and description 'Create a complete list layout with multiple columns for any ServiceNow table' indicate creation of new configuration objects in ServiceNow.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snow_create_list_layout Rate-limited

snow_create_list_layout stays usable, but capped — an agent stuck in a loop can't make hundreds of changes 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_create_list_layout": {
      "limits": [
        {
          "counter": "snow_create_list_layout_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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_create_list_layout

What does the snow_create_list_layout tool do? +

Create a complete list layout with multiple columns for any ServiceNow table. It is categorised as a Write tool in the Serac MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on snow_create_list_layout? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_create_list_layout: 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_create_list_layout? +

snow_create_list_layout is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit snow_create_list_layout? +

Yes. Add a rate_limit block to the snow_create_list_layout 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_create_list_layout completely? +

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

snow_create_list_layout 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.