snow_create_related_list · Serac MCP: Risk & Policy

WHAT IT DOES

What snow_create_related_list does on Serac

AI agents use snow_create_related_list 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_related_list needs a policy

This tool creates (adds) a new related list relationship between tables in ServiceNow, which modifies the data model/configuration. This is a reversible Write operation—related lists can be removed or reconfigured. It is not destructive (no deletion), not financial, and not Execute (no arbitrary code execution).

From the tool's definition Tool name is 'snow_create_related_list' and description states 'Surface a related table under a parent table'. The verb 'create' and action of surfacing/adding a related list indicates creation of a new configuration or metadata relationship in ServiceNow.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snow_create_related_list Rate-limited

snow_create_related_list 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_related_list": {
      "limits": [
        {
          "counter": "snow_create_related_list_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_related_list

What does the snow_create_related_list tool do? +

Surface a related table under a parent 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_related_list? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_create_related_list: 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_related_list? +

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

Can I rate-limit snow_create_related_list? +

Yes. Add a rate_limit block to the snow_create_related_list 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_related_list completely? +

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

snow_create_related_list 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.