list_catalog_items

THE RISK

Low Risk

Why list_catalog_items needs a policy

This tool queries and retrieves existing catalog item data from a database table. It supports search functionality but performs no create, update, delete, or execute operations. The capability is limited to reading and filtering data, making it a Read category risk with low severity since data retrieval alone poses minimal security risk unless the catalog contains highly sensitive information.

From the tool's definition Tool name 'list_catalog_items' and description 'List service catalog items from the sc_cat_item table. Supports text search' indicate a retrieval operation with no data modification or execution capability.

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

POLICY

How to control list_catalog_items

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 list_catalog_items:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_catalog_items": {}
  }
}

list_catalog_items is read-only, so it stays allowed — but 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.

CAP THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_catalog_items

What does the list_catalog_items tool do? +

List service catalog items from the sc_cat_item table. Supports text search. It is categorised as a Read tool in the Now Sdk Ext MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_catalog_items? +

Register the Now Sdk Ext MCP server in PolicyLayer and add a rule for list_catalog_items: 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 list_catalog_items? +

list_catalog_items is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_catalog_items? +

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

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

list_catalog_items 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 →