snow_create_access_control · Serac MCP: Risk & Policy

WHAT IT DOES

What snow_create_access_control does on Serac

AI agents use snow_create_access_control 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_access_control needs a policy

This tool creates ACL entries that grant roles permissions to perform operations (read/write/create/delete). Although it creates rather than deletes records (which would be Destructive), it writes directly to the security ACL table (sys_security_acl) in ServiceNow, which is a critical system table.

From the tool's definition 'Create an Access Control List (ACL) entry' and 'Writes to sys_security_acl' — the tool creates new access control records that modify security permissions.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snow_create_access_control Rate-limited

snow_create_access_control 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_access_control": {
      "limits": [
        {
          "counter": "snow_create_access_control_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_access_control

What does the snow_create_access_control tool do? +

Create an Access Control List (ACL) entry on a table: grants a role permission to perform an operation (read/write/create/delete) on records, optionally gated by a condition or advanced script. Writes to sys_security_acl. 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_access_control? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_create_access_control: 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_access_control? +

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

Can I rate-limit snow_create_access_control? +

Yes. Add a rate_limit block to the snow_create_access_control 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_access_control completely? +

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

snow_create_access_control 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_create_access_control 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.

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