# cmdb_find_duplicates

Find duplicate CIs by matching on specified fields (in-memory grouping)

Agent View of the PolicyLayer registry record for `cmdb_find_duplicates`. HTML page: https://policylayer.com/tools/servicenow-mcp-server/cmdb-find-duplicates

## Facts

- Tool: `cmdb_find_duplicates`
- Server: ServiceNow MCP Server (`@aartiq/servicenow-mcp`) — https://policylayer.com/tools/servicenow-mcp-server.md
- Install: `npx -y @aartiq/servicenow-mcp`
- Homepage: https://github.com/aartiq/servicenow-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity verified
- 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": "cmdb_find_duplicates",
    "arguments": {}
  }
}
```

## Why cmdb_find_duplicates is rated Low

This tool performs read-only operations to identify and analyze duplicate Configuration Items in ServiceNow's CMDB. It groups and matches data in memory but does not create, modify, or delete any records. The operation is informational and has no side effects on the system state. Therefore, it falls under the Read category with low severity.

From the tool's own definition: "Tool description states it finds duplicate CIs 'by matching on specified fields' with 'in-memory grouping'. The verb 'find' and the analysis nature (matching/grouping) indicate data retrieval and inspection only, with no modification or deletion."

## Use case

AI agents call cmdb_find_duplicates 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.

## Recommended policy (PolicyLayer)

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

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

## Other tools on ServiceNow MCP Server (414)

- `cmdb_reconcile` — Destructive — https://policylayer.com/tools/servicenow-mcp-server/cmdb-reconcile.md
- `delete_attachment` — Destructive — https://policylayer.com/tools/servicenow-mcp-server/delete-attachment.md
- `delete_record` — Destructive — https://policylayer.com/tools/servicenow-mcp-server/delete-record.md
- `delete_system_property` — Destructive — https://policylayer.com/tools/servicenow-mcp-server/delete-system-property.md
- `delete_uib_page` — Destructive — https://policylayer.com/tools/servicenow-mcp-server/delete-uib-page.md
- `remove_user_from_group` — Destructive — https://policylayer.com/tools/servicenow-mcp-server/remove-user-from-group.md
- `rollback_changes` — Destructive — https://policylayer.com/tools/servicenow-mcp-server/rollback-changes.md
- `rollback_deployment` — Destructive — https://policylayer.com/tools/servicenow-mcp-server/rollback-deployment.md
- `batch_request` — Execute — https://policylayer.com/tools/servicenow-mcp-server/batch-request.md
- `categorize_incident` — Execute — https://policylayer.com/tools/servicenow-mcp-server/categorize-incident.md
- `commit_changeset` — Execute — https://policylayer.com/tools/servicenow-mcp-server/commit-changeset.md
- `create_business_rule` — Execute — https://policylayer.com/tools/servicenow-mcp-server/create-business-rule.md
- `create_flow_action` — Execute — https://policylayer.com/tools/servicenow-mcp-server/create-flow-action.md
- `create_scheduled_job` — Execute — https://policylayer.com/tools/servicenow-mcp-server/create-scheduled-job.md
- `create_script_include` — Execute — https://policylayer.com/tools/servicenow-mcp-server/create-script-include.md
- `create_ui_action` — Execute — https://policylayer.com/tools/servicenow-mcp-server/create-ui-action.md
- `execute_background_script` — Execute — https://policylayer.com/tools/servicenow-mcp-server/execute-background-script.md
- `execute_playbook` — Execute — https://policylayer.com/tools/servicenow-mcp-server/execute-playbook.md
- `execute_script` — Execute — https://policylayer.com/tools/servicenow-mcp-server/execute-script.md
- `fire_event` — Execute — https://policylayer.com/tools/servicenow-mcp-server/fire-event.md
- `fluent_build` — Execute — https://policylayer.com/tools/servicenow-mcp-server/fluent-build.md
- `fluent_explain` — Execute — https://policylayer.com/tools/servicenow-mcp-server/fluent-explain.md
- `fluent_init` — Execute — https://policylayer.com/tools/servicenow-mcp-server/fluent-init.md
- `fluent_validate` — Execute — https://policylayer.com/tools/servicenow-mcp-server/fluent-validate.md
- `ml_detect_anomalies` — Execute — https://policylayer.com/tools/servicenow-mcp-server/ml-detect-anomalies.md
- `ml_train_anomaly_detector` — Execute — https://policylayer.com/tools/servicenow-mcp-server/ml-train-anomaly-detector.md
- `ml_train_change_risk` — Execute — https://policylayer.com/tools/servicenow-mcp-server/ml-train-change-risk.md
- `ml_train_incident_classifier` — Execute — https://policylayer.com/tools/servicenow-mcp-server/ml-train-incident-classifier.md
- `publish_changeset` — Execute — https://policylayer.com/tools/servicenow-mcp-server/publish-changeset.md
- `run_aggregate_query` — Execute — https://policylayer.com/tools/servicenow-mcp-server/run-aggregate-query.md
- …and 384 more: https://policylayer.com/tools/servicenow-mcp-server.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`

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