create_va_topic · ServiceNow- MCP: Risk & Policy

WHAT IT DOES

What create_va_topic does on ServiceNow-MCP

AI agents use create_va_topic 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_va_topic needs a policy

This tool creates a new entity (Virtual Agent topic) in ServiceNow, which is a reversible modification operation. It does not execute arbitrary code, delete data, or move money. The Write category is appropriate.

From the tool's definition Tool name 'create_va_topic' and description explicitly states 'Create a new Virtual Agent conversation topic' with **[Write]** classification. Creates a new configuration object in ServiceNow.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_va_topic Rate-limited

create_va_topic 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_va_topic": {
      "limits": [
        {
          "counter": "create_va_topic_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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_va_topic

What does the create_va_topic tool do? +

Create a new Virtual Agent conversation topic. [Write]. 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_va_topic? +

Register the ServiceNow- MCP server in PolicyLayer and add a rule for create_va_topic: 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_va_topic? +

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

Can I rate-limit create_va_topic? +

Yes. Add a rate_limit block to the create_va_topic 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_va_topic completely? +

Set action: deny in the PolicyLayer policy for create_va_topic. 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_va_topic? +

create_va_topic 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.