list_code_search_tables

THE RISK

Low Risk

Why list_code_search_tables needs a policy

This tool retrieves metadata about code search configuration (tables associated with a group) with no side effects. It performs a simple enumeration or query of existing data. The blast radius of misuse is minimal as it only exposes information about system configuration, not sensitive data modification or execution of arbitrary operations.

From the tool's definition List the tables associated with a code search group. These are the tables - the verb 'list' and the action of retrieving/enumerating tables without modification indicates a read-only query operation.

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

POLICY

How to control list_code_search_tables

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_code_search_tables:

policy.json

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

list_code_search_tables 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.

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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_code_search_tables

What does the list_code_search_tables tool do? +

List the tables associated with a code search group. These are the tables. 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_code_search_tables? +

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

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

Can I rate-limit list_code_search_tables? +

Yes. Add a rate_limit block to the list_code_search_tables 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_code_search_tables completely? +

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

list_code_search_tables 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 →