snow_table_schema_discovery
Discover comprehensive table schema including fields, relationships, ACLs, and business rules
This record as markdown: /tools/serac/snow-table-schema-discovery.md
What snow_table_schema_discovery does on Serac
AI agents call snow_table_schema_discovery to retrieve information from Serac without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why snow_table_schema_discovery is rated Low
The tool performs schema discovery — reading and querying metadata about a ServiceNow table (fields, relationships, ACLs, business rules). This is purely a read/introspection operation with no side effects. However, severity is medium because schema data (especially ACLs and business rules) is sensitive security-relevant information that could be leveraged to plan further attacks or privilege escalation.
From the tool's definition Discover comprehensive table schema including fields, relationships, ACLs, and business rules
Attacks that exploit this kind of access
The rule that runs snow_table_schema_discovery 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_table_schema_discovery, this is the rule to start with:
snow_table_schema_discovery is read-only, so it stays allowed. 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_table_schema_discovery call is checked against it from then on.
Questions about snow_table_schema_discovery
Discover comprehensive table schema including fields, relationships, ACLs, and business rules. It is categorised as a Read tool in the Serac MCP Server, which means it retrieves data without modifying state.
Register the Serac MCP server in PolicyLayer and add a rule for snow_table_schema_discovery: 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_table_schema_discovery is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the snow_table_schema_discovery 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_table_schema_discovery. 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_table_schema_discovery 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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