AI agents use snow_create_ui_policy_action 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 UI policy actions in ServiceNow, which is a write operation that modifies system configuration. While reversible (UI policies can be deleted or edited), the blast radius is high because misconfigured UI policies could hide critical fields, make sensitive fields mandatory, or lock read-only fields, potentially disrupting business processes or enabling social engineering attacks.
From the tool's definition Tool name contains 'create' and description states 'Create a UI policy action' which modifies ServiceNow configuration. The action controls field behavior (visible/mandatory/readonly), representing reversible configuration changes to the enterprise system.
Attacks that exploit this kind of access
Create a UI policy action to control field behavior (visible/mandatory/readonly) when a UI policy condition is met. Requires the parent UI policy sys_id and the target table name. 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_ui_policy_action: 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_ui_policy_action 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_ui_policy_action 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_ui_policy_action. 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_ui_policy_action 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_ui_policy_action 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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