get_current_update_set

THE RISK

Low Risk

Why get_current_update_set needs a policy

This tool queries and retrieves information about the currently active update set without modifying, executing, or destroying any data. It is a read-only operation that returns state information from the ServiceNow instance. The blast radius of misuse is minimal—an agent could only learn about the current update set context, which does not affect system state or enable further privileged actions on its own.

From the tool's definition Tool name 'get_current_update_set' and description 'Get the currently active update set for the session' indicate a retrieval operation with no modification or deletion of data.

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

POLICY

How to control get_current_update_set

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 get_current_update_set:

policy.json

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

get_current_update_set 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

Related tools and policies

More Now Sdk Ext tools

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All 86 Now Sdk Ext tools →

Read 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.
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 get_current_update_set

What does the get_current_update_set tool do? +

Get the currently active update set for the session. 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 get_current_update_set? +

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

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

Can I rate-limit get_current_update_set? +

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

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

get_current_update_set 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 →