# protect_merge_known_faces

A write tool on the UniFi Access MCP MCP server.

Agent View of the PolicyLayer registry record for `protect_merge_known_faces`. HTML page: https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/protect-merge-known-faces

## Facts

- Tool: `protect_merge_known_faces`
- Server: UniFi Access MCP (`pypi:unifi-protect-mcp`) — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp.md
- Install: `npx -y pypi:unifi-protect-mcp`
- Homepage: https://github.com/sirkirby/unifi-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

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

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

## Why protect_merge_known_faces is rated Medium

This tool appears to modify face recognition data used by the access control system. While not irreversible (Write rather than Destructive) and not executing arbitrary code (Execute), merging facial biometric records could alter how the system recognizes and grants access to individuals.

From the tool's own definition: "Tool name 'protect_merge_known_faces' suggests modifying or consolidating face recognition data. The description is empty, making definitive classification difficult."

## Use case

AI agents use protect_merge_known_faces to create or update resources in UniFi Access MCP, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your UniFi Access MCP environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches UniFi Access MCP:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "protect_merge_known_faces": {
      "limits": [
        {
          "counter": "protect_merge_known_faces_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on UniFi Access MCP (271)

- `access_delete_visitor` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/access-delete-visitor.md
- `access_revoke_credential` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/access-revoke-credential.md
- `protect_alarm_delete_rule` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/protect-alarm-delete-rule.md
- `protect_delete_known_face` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/protect-delete-known-face.md
- `protect_delete_known_license_plate` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/protect-delete-known-license-plate.md
- `protect_delete_liveview` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/protect-delete-liveview.md
- `protect_delete_recording` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/protect-delete-recording.md
- `unifi_delete_acl_rule` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-acl-rule.md
- `unifi_delete_ap_group` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-ap-group.md
- `unifi_delete_backup` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-backup.md
- `unifi_delete_client_group` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-client-group.md
- `unifi_delete_content_filter` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-content-filter.md
- `unifi_delete_dns_record` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-dns-record.md
- `unifi_delete_dynamic_dns` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-dynamic-dns.md
- `unifi_delete_firewall_group` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-firewall-group.md
- `unifi_delete_firewall_policy` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-firewall-policy.md
- `unifi_delete_oon_policy` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-oon-policy.md
- `unifi_delete_port_forward` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-port-forward.md
- `unifi_delete_port_profile` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-port-profile.md
- `unifi_delete_wlan` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-delete-wlan.md
- `unifi_forget_client` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-forget-client.md
- `unifi_revoke_voucher` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-revoke-voucher.md
- `unifi_unauthorize_guest` — Destructive — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/unifi-unauthorize-guest.md
- `access_lock_door` — Execute — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/access-lock-door.md
- `access_reboot_device` — Execute — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/access-reboot-device.md
- `access_unlock_door` — Execute — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/access-unlock-door.md
- `protect_ptz_move` — Execute — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/protect-ptz-move.md
- `protect_ptz_preset` — Execute — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/protect-ptz-preset.md
- `protect_reboot_camera` — Execute — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/protect-reboot-camera.md
- `protect_trigger_chime` — Execute — https://policylayer.com/tools/io-github-sirkirby-unifi-access-mcp/protect-trigger-chime.md
- …and 241 more: https://policylayer.com/tools/io-github-sirkirby-unifi-access-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=io-github-sirkirby-unifi-access-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-sirkirby-unifi-access-mcp