create_kb_article

THE RISK

Medium Risk

Why create_kb_article needs a policy

This tool creates new knowledge articles, which is a reversible Write operation. While it creates persistent data in an enterprise system, it does not execute arbitrary code, delete data irreversibly, or move funds. The severity is medium because uncontrolled creation could flood the knowledge base or introduce incorrect documentation, but effects are discoverable and can be remedied by deletion or revision.

From the tool's definition Tool name 'create_kb_article' and description 'Create a new knowledge article in a specified knowledge base' directly indicate creation of new data in a ServiceNow instance.

Documented attack patterns abuse exactly the kind of access create_kb_article gives an agent:

POLICY

How to control create_kb_article

PolicyLayer is an MCP gateway — it sits between your AI agents and Now Sdk Ext, and nothing reaches the server without passing your rules. This is the rule we recommend for create_kb_article:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_kb_article": {
      "limits": [
        {
          "counter": "create_kb_article_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

create_kb_article 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.

Create a free account and register Now Sdk Ext — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Now Sdk Ext tools

Destructive cancel_flow Cancel a running or paused flow execution by its context ID. Destructive query_delete_records Find records matching an encoded query and delete them all. Execute aggregate_grouped Run aggregate functions (COUNT, AVG, MIN, MAX, SUM) grouped by a field on any Execute execute_action Execute a ServiceNow Flow Designer action by scoped name. Execute execute_flow Execute a published ServiceNow Flow Designer flow by scoped name. Execute execute_script Execute JavaScript on a ServiceNow instance using Scripts - Background Execute execute_subflow Execute a ServiceNow Flow Designer subflow by scoped name. Execute run_atf_test Execute a single ServiceNow ATF (Automated Test Framework) test by its sys_id.

All 86 Now Sdk Ext tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about create_kb_article

What does the create_kb_article tool do? +

Create a new knowledge article in a specified knowledge base. The article is. It is categorised as a Write tool in the Now Sdk Ext 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_kb_article? +

Register the Now Sdk Ext MCP server in PolicyLayer and add a rule for create_kb_article: 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 Now Sdk Ext. Nothing to install.

What risk level is create_kb_article? +

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

Can I rate-limit create_kb_article? +

Yes. Add a rate_limit block to the create_kb_article 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_kb_article completely? +

Set action: deny in the PolicyLayer policy for create_kb_article. 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_kb_article? +

create_kb_article is provided by the Now Sdk Ext MCP server (sonisoft-cnanda/now-sdk-ext-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Now Sdk Ext tool call.

Start from Now Sdk Ext, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →