Get variables/questions for a catalog item (required fields for ordering)
AI agents call catalog_item_variables to retrieve information from ServiceNow MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns metadata about a catalog item's structure (its variables and required fields). It does not create, modify, delete, or execute any operations; it only retrieves information needed to understand what parameters are required when ordering. This is a straightforward read operation with minimal security risk—the data returned is informational only.
From the tool's definition Tool retrieves variables/questions for a catalog item and specifies this is for determining 'required fields for ordering'—a pure data retrieval operation with no modification or execution side effects.
Attacks that exploit this kind of access
Get variables/questions for a catalog item (required fields for ordering). It is categorised as a Read tool in the ServiceNow MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ServiceNow MCP Server MCP server in PolicyLayer and add a rule for catalog_item_variables: 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.
catalog_item_variables 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 catalog_item_variables 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 catalog_item_variables. 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.
catalog_item_variables is provided by the ServiceNow MCP Server MCP server (schwarztim/servicenow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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