AI agents call inspect_update_set to retrieve information from Now Sdk Ext without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The verb 'inspect' implies viewing or examining data. No modifying language (create, update, delete, deploy) is present. In the context of ServiceNow, inspecting an update set means querying its contents and metadata to understand what changes it contains, which is a retrieval operation with no side effects.
From the tool's definition Tool name 'inspect_update_set' and description 'Inspect an update set' indicate a read-only operation that retrieves or examines information about an update set without modifying it.
Documented attack patterns abuse exactly the kind of access inspect_update_set gives an agent:
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 inspect_update_set:
{
"version": "1",
"default": "deny",
"tools": {
"inspect_update_set": {}
}
}inspect_update_set is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Inspect an update set. It is categorised as a Read tool in the Now Sdk Ext MCP Server, which means it retrieves data without modifying state.
Register the Now Sdk Ext MCP server in PolicyLayer and add a rule for inspect_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.
inspect_update_set is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the inspect_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.
Set action: deny in the PolicyLayer policy for inspect_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.
inspect_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.
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.
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86 Now Sdk Ext tools catalogued and risk-classified — across an index of 43,000+ MCP servers.