AI agents use snow_add_dashboard_widget 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 or modifies dashboard configuration data by attaching widgets to dashboards. It is reversible (widgets can be removed or modified), so it is categorized as Write rather than Destructive. The severity is medium because unauthorized widget addition could alter UI/UX for ServiceNow users and potentially expose sensitive data through custom widgets, but does not permanently destroy data or move money.
From the tool's definition Tool description states 'Attach a widget to an existing dashboard' and 'Writes to sys_dashboard_widget', indicating creation of new dashboard widget records.
Attacks that exploit this kind of access
Attach a widget to an existing dashboard (sys_dashboard) with a widget type and optional title and position. Writes to sys_dashboard_widget. 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_add_dashboard_widget: 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_add_dashboard_widget 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_add_dashboard_widget 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_add_dashboard_widget. 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_add_dashboard_widget 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_add_dashboard_widget 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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