snow_create_variable_set

Create a reusable variable set (item_option_new_set) — a grouping of catalog variables that can be attached to multiple catalog items, e.g. a shared

SERVERSerac SOURCEserac-labs/serac

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/serac/snow-create-variable-set.md

WHAT IT DOES

What snow_create_variable_set does on Serac

AI agents use snow_create_variable_set 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.

RISK

Why snow_create_variable_set is rated Medium

This tool creates new configuration objects (variable sets) that can be reused across multiple catalog items. This is a reversible write operation — variable sets can be updated or deleted later. The blast radius is medium because misconfigured variable sets could affect multiple catalog items and user experiences, but the operation is not destructive, financial, or code-execution based.

From the tool's definition Tool name contains 'create' and description states 'Create a reusable variable set' — directly indicates creation of new data structures in ServiceNow catalog system.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs snow_create_variable_set safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Serac, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For snow_create_variable_set, this is the rule to start with:

snow_create_variable_set Rate-limited

snow_create_variable_set 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_variable_set": {
      "limits": [
        {
          "counter": "snow_create_variable_set_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Serac, apply this rule, and every snow_create_variable_set call is checked against it from then on.

FAQ

Questions about snow_create_variable_set

What does the snow_create_variable_set tool do? +

Create a reusable variable set (item_option_new_set) — a grouping of catalog variables that can be attached to multiple catalog items, e.g. a shared. 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_variable_set? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_create_variable_set: 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_variable_set? +

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

Can I rate-limit snow_create_variable_set? +

Yes. Add a rate_limit block to the snow_create_variable_set 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_variable_set completely? +

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

snow_create_variable_set 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.

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