AI agents use snow_create_menu_item 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 a new navigation menu item in ServiceNow, which is a reversible modification of application configuration. It does not execute arbitrary code (Execute), delete data (Destructive), move money (Financial), or merely query (Read). It is a Write operation because it adds/creates a new sys_app_module record.
From the tool's definition Tool description states it 'Add[s] a navigation item (sys_app_module) under a parent menu', which is a create operation that modifies the UI/navigation structure.
Attacks that exploit this kind of access
Add a navigation item (sys_app_module) under a parent menu, opening a list / new record / detail / home view on a target table. Order controls placement within the parent. 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_menu_item: 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_menu_item 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_menu_item 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_menu_item. 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_menu_item 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_menu_item 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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