snow_create_uib_data_broker · Serac MCP: Risk & Policy

WHAT IT DOES

What snow_create_uib_data_broker does on Serac

AI agents use snow_create_uib_data_broker 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_uib_data_broker needs a policy

This tool creates a new data broker configuration, which is a reversible write operation that modifies ServiceNow's configuration state. It does not delete data (ruling out Destructive), does not execute arbitrary code (ruling out Execute), and does not involve financial transactions (ruling out Financial).

From the tool's definition Tool name contains 'create' and description states 'Create data broker to connect UI Builder pages to ServiceNow data sources'. The verb 'Create' indicates data creation/modification rather than retrieval.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snow_create_uib_data_broker Rate-limited

snow_create_uib_data_broker 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_uib_data_broker": {
      "limits": [
        {
          "counter": "snow_create_uib_data_broker_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_uib_data_broker

What does the snow_create_uib_data_broker tool do? +

Create data broker to connect UI Builder pages to ServiceNow data sources. 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_uib_data_broker? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_create_uib_data_broker: 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_uib_data_broker? +

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

Can I rate-limit snow_create_uib_data_broker? +

Yes. Add a rate_limit block to the snow_create_uib_data_broker 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_uib_data_broker completely? +

Set action: deny in the PolicyLayer policy for snow_create_uib_data_broker. 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_uib_data_broker? +

snow_create_uib_data_broker 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.