create_uib_data_broker · ServiceNow- MCP: Risk & Policy

WHAT IT DOES

What create_uib_data_broker does on ServiceNow-MCP

AI agents use create_uib_data_broker to create or update resources in ServiceNow-MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your ServiceNow-MCP environment.

WHY IT NEEDS A POLICY

Why create_uib_data_broker needs a policy

This tool creates a new artifact (a UI Builder data broker) in ServiceNow, which is a Write operation. However, the [Scripting] tag indicates it may involve server-side script execution as part of the data broker definition, elevating severity. Misuse could introduce malicious scripts into UI Builder pages affecting all users who load them, making it high severity.

From the tool's definition 'Create a UI Builder data broker to feed data to a page' and '[Scripting]' tag

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_uib_data_broker Rate-limited

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": {
    "create_uib_data_broker": {
      "limits": [
        {
          "counter": "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 ServiceNow-MCP, so you can run agents against it safely.

FAQ

Questions about create_uib_data_broker

What does the create_uib_data_broker tool do? +

Create a UI Builder data broker to feed data to a page. [Scripting]. It is categorised as a Write tool in the ServiceNow-MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_uib_data_broker? +

Register the ServiceNow- MCP server in PolicyLayer and add a rule for 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 ServiceNow-MCP. Nothing to install.

What risk level is create_uib_data_broker? +

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 create_uib_data_broker? +

Yes. Add a rate_limit block to the 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 create_uib_data_broker completely? +

Set action: deny in the PolicyLayer policy for 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 create_uib_data_broker? +

create_uib_data_broker is provided by the ServiceNow- MCP server (tedorigawa001/servicenow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.