compare_instances

Compare two configured ServiceNow instances: record counts for a table (with optional query) and/or a specific system property value. Useful for dev→prod drift detection and governance.

SERVERServiceNow MCP Server SOURCE@aartiq/servicenow-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/servicenow-mcp-server/compare-instances.md

WHAT IT DOES

What compare_instances does on ServiceNow MCP Server

AI agents call compare_instances to retrieve information from ServiceNow MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why compare_instances is rated Low

The tool performs read-only queries against ServiceNow instances to gather comparative data (counts and property values). It has no capability to modify, delete, execute, or trigger financial operations. The worst-case misuse would be information disclosure about system configuration differences, which is a low-severity Read operation.

From the tool's definition Tool description states it "Compare[s]" and retrieves "record counts" and "system property value[s]" without any indication of modification, deletion, or execution of side-effecting operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs compare_instances safely

PolicyLayer is an MCP gateway: it sits between your AI agents and ServiceNow MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For compare_instances, this is the rule to start with:

compare_instances Allowed

compare_instances is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect ServiceNow MCP Server, apply this rule, and every compare_instances call is checked against it from then on.

FAQ

Questions about compare_instances

What does the compare_instances tool do? +

Compare two configured ServiceNow instances: record counts for a table (with optional query) and/or a specific system property value. Useful for dev→prod drift detection and governance. It is categorised as a Read tool in the ServiceNow MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on compare_instances? +

Register the ServiceNow MCP Server MCP server in PolicyLayer and add a rule for compare_instances: 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 ServiceNow MCP Server. Nothing to install.

What risk level is compare_instances? +

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

Can I rate-limit compare_instances? +

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

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

compare_instances is provided by the ServiceNow MCP Server MCP server (@aartiq/servicenow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on ServiceNow MCP Server, and thousands of servers like it.

This server

All 415 ServiceNow MCP Server tools →

Across the catalogue

The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →