# get_table_schema

Get the structure and field information for a ServiceNow table

Agent View of the PolicyLayer registry record for `get_table_schema`. HTML page: https://policylayer.com/tools/tedorigawa001-servicenow-mcp/get-table-schema

## Facts

- Tool: `get_table_schema`
- Server: ServiceNow-MCP (`tedorigawa001/servicenow-mcp`) — https://policylayer.com/tools/tedorigawa001-servicenow-mcp.md
- Homepage: https://github.com/tedorigawa001/ServiceNow-MCP
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_table_schema",
    "arguments": {}
  }
}
```

## Why get_table_schema is rated Low

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 own 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."

## Use case

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

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches ServiceNow-MCP:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_table_schema": {}
  }
}
```

## Other tools on ServiceNow-MCP (494)

- `cancel_request` — Destructive — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/cancel-request.md
- `delete_attachment` — Destructive — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/delete-attachment.md
- `delete_system_property` — Destructive — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/delete-system-property.md
- `delete_uib_page` — Destructive — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/delete-uib-page.md
- `remove_user_from_group` — Destructive — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/remove-user-from-group.md
- `restore_archived_record` — Destructive — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/restore-archived-record.md
- `rollback_deployment` — Destructive — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/rollback-deployment.md
- `set_cleanup_rule_active` — Destructive — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/set-cleanup-rule-active.md
- `set_destroy_rule_active` — Destructive — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/set-destroy-rule-active.md
- `commit_changeset` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/commit-changeset.md
- `create_business_rule` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/create-business-rule.md
- `create_client_script` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/create-client-script.md
- `create_flow_action` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/create-flow-action.md
- `create_scheduled_job` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/create-scheduled-job.md
- `create_script_include` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/create-script-include.md
- `execute_background_script` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/execute-background-script.md
- `fire_event` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/fire-event.md
- `ml_detect_anomalies` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/ml-detect-anomalies.md
- `ml_train_anomaly_detector` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/ml-train-anomaly-detector.md
- `ml_train_change_risk` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/ml-train-change-risk.md
- `ml_train_incident_classifier` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/ml-train-incident-classifier.md
- `publish_changeset` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/publish-changeset.md
- `run_aggregate_query` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/run-aggregate-query.md
- `run_atf_suite` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/run-atf-suite.md
- `run_atf_test` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/run-atf-test.md
- `run_discovery_scan` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/run-discovery-scan.md
- `run_security_playbook` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/run-security-playbook.md
- `run_transform_map` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/run-transform-map.md
- `scan_vulnerabilities` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/scan-vulnerabilities.md
- `smart_query` — Execute — https://policylayer.com/tools/tedorigawa001-servicenow-mcp/smart-query.md
- …and 464 more: https://policylayer.com/tools/tedorigawa001-servicenow-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=tedorigawa001-servicenow-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/tedorigawa001-servicenow-mcp