Add an input variable to a catalog item (item_option_new) with name, question text, and input type (single/multi-line text, multiple_choice, select_box). Mostly equivalent to snow_create_variable but with a narrower type list.
AI agents use snow_create_catalog_variable to create or update resources in Serac — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Serac environment.
This tool creates new catalog item variables in ServiceNow, which is a write operation that modifies the configuration of service catalog items. While reversible (variables can be deleted), the scope is medium severity because changes to catalog items affect customer-facing service offerings and workflow processes.
From the tool's definition Tool description explicitly states it 'Add[s] an input variable to a catalog item' which creates/modifies ServiceNow catalog configuration. The term 'Add' and 'create' indicate reversible data modification rather than read-only operations.
Attacks that exploit this kind of access
Add an input variable to a catalog item (item_option_new) with name, question text, and input type (single/multi-line text, multiple_choice, select_box). Mostly equivalent to snow_create_variable but with a narrower type list. It is categorised as a Write tool in the Serac MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Serac MCP server in PolicyLayer and add a rule for snow_create_catalog_variable: 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 Serac. Nothing to install.
snow_create_catalog_variable is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the snow_create_catalog_variable 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 snow_create_catalog_variable. 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.
snow_create_catalog_variable is provided by the Serac MCP server (serac-labs/serac). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
snow_create_catalog_variable is one line of Serac's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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