discover_table

Discover a ServiceNow table schema and register dynamic CRUD tools for it.

SERVERServiceNow MCP Server SOURCE@aartiq/servicenow-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/servicenow-mcp-server/discover-table.md

WHAT IT DOES

What discover_table does on ServiceNow MCP Server

AI agents call discover_table to retrieve information from ServiceNow MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why discover_table is rated Low

The primary action is reading/discovering schema information, which is a Read operation. However, it also 'registers dynamic CRUD tools' as a side effect, which is a Write-like operation that could expand the attack surface by exposing new tools. Despite this secondary effect, schema discovery is the core action; registering tools is an internal framework side effect rather than a data modification.

From the tool's definition 'Discover a ServiceNow table schema' — retrieves schema/metadata about a table

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs discover_table safely

PolicyLayer is an MCP gateway: it sits between your AI agents and ServiceNow MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For discover_table, this is the rule to start with:

discover_table Allowed

discover_table is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "discover_table": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect ServiceNow MCP Server, apply this rule, and every discover_table call is checked against it from then on.

FAQ

Questions about discover_table

What does the discover_table tool do? +

Discover a ServiceNow table schema and register dynamic CRUD tools for it. It is categorised as a Read tool in the ServiceNow MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on discover_table? +

Register the ServiceNow MCP Server MCP server in PolicyLayer and add a rule for discover_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 ServiceNow MCP Server. Nothing to install.

What risk level is discover_table? +

discover_table is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit discover_table? +

Yes. Add a rate_limit block to the discover_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.

How do I block discover_table completely? +

Set action: deny in the PolicyLayer policy for discover_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.

What MCP server provides discover_table? +

discover_table is provided by the ServiceNow MCP Server MCP server (@aartiq/servicenow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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