snow_create_table
Create a new table (sys_db_object) with a name and label. Optionally extends a parent table (super_class) for inheritance, and toggles is_extendable. Add columns with snow_create_field.
This record as markdown: /tools/serac/snow-create-table.md
What snow_create_table does on Serac
AI agents use snow_create_table 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.
Why snow_create_table is rated Medium
This tool creates new database table objects in ServiceNow, which is a Write operation. The severity is high because creating tables in an enterprise system affects data structure, schema integrity, and potentially cascading dependencies across the platform. An AI agent misusing this could create unwanted tables, pollute the schema, or interfere with system organization.
From the tool's definition Tool name contains 'create' and description states 'Create a new table (sys_db_object)' — this is data creation in a ServiceNow instance.
Attacks that exploit this kind of access
The rule that runs snow_create_table safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Serac, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For snow_create_table, this is the rule to start with:
snow_create_table 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 Serac, apply this rule, and every snow_create_table call is checked against it from then on.
Questions about snow_create_table
Create a new table (sys_db_object) with a name and label. Optionally extends a parent table (super_class) for inheritance, and toggles is_extendable. Add columns with snow_create_field. 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_table: 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_table 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_table 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_table. 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_table 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.
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