Get the structure and field information for a ServiceNow table
AI agents call get_table_schema to retrieve information from ServiceNow-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves schema information—a read-only operation with no side effects. It returns structural metadata about ServiceNow tables (field names, types, properties) but does not create, modify, execute, or delete any data. The blast radius is minimal: misuse would at worst expose schema information an attacker likely needs permission to access anyway, but cannot directly harm data or systems.
From the tool's definition Tool name 'get_table_schema' and description 'Get the structure and field information for a ServiceNow table' indicate a retrieval operation that queries table metadata without modification or execution.
Attacks that exploit this kind of access
Get the structure and field information for a ServiceNow table. It is categorised as a Read tool in the ServiceNow-MCP MCP Server, which means it retrieves data without modifying state.
Register the ServiceNow- MCP server in PolicyLayer and add a rule for get_table_schema: 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 ServiceNow-MCP. Nothing to install.
get_table_schema 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 get_table_schema 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 get_table_schema. 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.
get_table_schema is provided by the ServiceNow- MCP server (tedorigawa001/servicenow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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