assign_user_criteria
Attach a user criteria to a catalog item as available-for (sc_cat_item_user_criteria_mtom). Requires WRITE_ENABLED=true
This record as markdown: /tools/nowaikit-servicenow-ai-toolkit/assign-user-criteria.md
What assign_user_criteria does on NowAIKit — ServiceNow AI Toolkit
AI agents use assign_user_criteria to create or update resources in NowAIKit — ServiceNow AI Toolkit, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your NowAIKit — ServiceNow AI Toolkit environment.
Why assign_user_criteria is rated Medium
Modifies catalog configuration reversibly by attaching user access criteria to items.
From the tool's definition Attach user criteria to catalog item; requires WRITE_ENABLED=true
Attacks that exploit this kind of access
The rule that runs assign_user_criteria safely
PolicyLayer is an MCP gateway: it sits between your AI agents and NowAIKit — ServiceNow AI Toolkit, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For assign_user_criteria, this is the rule to start with:
assign_user_criteria stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect NowAIKit — ServiceNow AI Toolkit, apply this rule, and every assign_user_criteria call is checked against it from then on.
Questions about assign_user_criteria
Attach a user criteria to a catalog item as available-for (sc_cat_item_user_criteria_mtom). Requires WRITE_ENABLED=true. It is categorised as a Write tool in the NowAIKit — ServiceNow AI Toolkit MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the NowAIKit — ServiceNow AI Toolkit MCP server in PolicyLayer and add a rule for assign_user_criteria: 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 NowAIKit — ServiceNow AI Toolkit. Nothing to install.
assign_user_criteria 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 assign_user_criteria 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 assign_user_criteria. 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.
assign_user_criteria is provided by the NowAIKit — ServiceNow AI Toolkit MCP server (nowaikit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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