snow_create_data_policy_rule

Add a field rule to an existing Data Policy: mark the field as mandatory and/or read-only when the parent policy

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-data-policy-rule.md

WHAT IT DOES

What snow_create_data_policy_rule does on Serac

AI agents use snow_create_data_policy_rule 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_data_policy_rule is rated Medium

This tool creates or adds new field rules to existing ServiceNow Data Policies, which modifies system configuration. It is not immediately destructive (the rule can be removed), but carries high severity due to the blast radius: a misconfigured data policy rule could inadvertently restrict access, make critical fields read-only, or enforce mandatory constraints across the enterprise, affecting many users and…

From the tool's definition Tool name includes 'create' and description states 'Add a field rule to an existing Data Policy' — this creates or modifies a policy rule within ServiceNow. The action is reversible (rules can be removed/edited later), making it Write rather than Destructive.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs snow_create_data_policy_rule 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_data_policy_rule, this is the rule to start with:

snow_create_data_policy_rule Rate-limited

snow_create_data_policy_rule 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_data_policy_rule": {
      "limits": [
        {
          "counter": "snow_create_data_policy_rule_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_data_policy_rule call is checked against it from then on.

FAQ

Questions about snow_create_data_policy_rule

What does the snow_create_data_policy_rule tool do? +

Add a field rule to an existing Data Policy: mark the field as mandatory and/or read-only when the parent policy. 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_data_policy_rule? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_create_data_policy_rule: 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_data_policy_rule? +

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

Can I rate-limit snow_create_data_policy_rule? +

Yes. Add a rate_limit block to the snow_create_data_policy_rule 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_data_policy_rule completely? +

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

snow_create_data_policy_rule 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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