# close_tab

Close a specific Safari tab. Use list_tabs to find window/tab indices.

Agent View of the PolicyLayer registry record for `close_tab`. HTML page: https://policylayer.com/tools/heznpc-airmcp/close-tab

## Facts

- Tool: `close_tab`
- Server: AirMCP (`airmcp`) — https://policylayer.com/tools/heznpc-airmcp.md
- Install: `npx -y airmcp`
- Homepage: https://github.com/heznpc/AirMCP
- Risk category: Destructive (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Hidden

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

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

## Why close_tab is rated Critical

Closing a tab is an irreversible action — once closed, unsaved page state, form data, and browsing context are permanently lost. This cannot be undone programmatically. The action matches the Destructive category (irreversibly removes state). Severity is medium because it affects browser session state but not persistent data like files or records.

From the tool's own definition: "Close a specific Safari tab"

## Use case

AI agents call close_tab to permanently remove resources in AirMCP, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "hide": [
    "close_tab"
  ]
}
```

## Other tools on AirMCP (278)

- `delete_contact` — Destructive — https://policylayer.com/tools/heznpc-airmcp/delete-contact.md
- `delete_event` — Destructive — https://policylayer.com/tools/heznpc-airmcp/delete-event.md
- `delete_note` — Destructive — https://policylayer.com/tools/heznpc-airmcp/delete-note.md
- `delete_photos` — Destructive — https://policylayer.com/tools/heznpc-airmcp/delete-photos.md
- `delete_playlist` — Destructive — https://policylayer.com/tools/heznpc-airmcp/delete-playlist.md
- `delete_reminder` — Destructive — https://policylayer.com/tools/heznpc-airmcp/delete-reminder.md
- `delete_reminder_list` — Destructive — https://policylayer.com/tools/heznpc-airmcp/delete-reminder-list.md
- `delete_shortcut` — Destructive — https://policylayer.com/tools/heznpc-airmcp/delete-shortcut.md
- `memory_forget` — Destructive — https://policylayer.com/tools/heznpc-airmcp/memory-forget.md
- `move_note` — Destructive — https://policylayer.com/tools/heznpc-airmcp/move-note.md
- `quit_app` — Destructive — https://policylayer.com/tools/heznpc-airmcp/quit-app.md
- `remove_from_playlist` — Destructive — https://policylayer.com/tools/heznpc-airmcp/remove-from-playlist.md
- `semantic_clear` — Destructive — https://policylayer.com/tools/heznpc-airmcp/semantic-clear.md
- `semantic_index` — Destructive — https://policylayer.com/tools/heznpc-airmcp/semantic-index.md
- `spotlight_clear` — Destructive — https://policylayer.com/tools/heznpc-airmcp/spotlight-clear.md
- `system_power` — Destructive — https://policylayer.com/tools/heznpc-airmcp/system-power.md
- `trash_file` — Destructive — https://policylayer.com/tools/heznpc-airmcp/trash-file.md
- `activate_tab` — Execute — https://policylayer.com/tools/heznpc-airmcp/activate-tab.md
- `ai_agent` — Execute — https://policylayer.com/tools/heznpc-airmcp/ai-agent.md
- `ai_chat` — Execute — https://policylayer.com/tools/heznpc-airmcp/ai-chat.md
- `ai_plan_metrics` — Execute — https://policylayer.com/tools/heznpc-airmcp/ai-plan-metrics.md
- `connect_bluetooth` — Execute — https://policylayer.com/tools/heznpc-airmcp/connect-bluetooth.md
- `disconnect_bluetooth` — Execute — https://policylayer.com/tools/heznpc-airmcp/disconnect-bluetooth.md
- `drop_pin` — Execute — https://policylayer.com/tools/heznpc-airmcp/drop-pin.md
- `duplicate_shortcut` — Execute — https://policylayer.com/tools/heznpc-airmcp/duplicate-shortcut.md
- `edit_shortcut` — Execute — https://policylayer.com/tools/heznpc-airmcp/edit-shortcut.md
- `event_subscribe` — Execute — https://policylayer.com/tools/heznpc-airmcp/event-subscribe.md
- `generate_image` — Execute — https://policylayer.com/tools/heznpc-airmcp/generate-image.md
- `generate_structured` — Execute — https://policylayer.com/tools/heznpc-airmcp/generate-structured.md
- `gws_raw` — Execute — https://policylayer.com/tools/heznpc-airmcp/gws-raw.md
- …and 248 more: https://policylayer.com/tools/heznpc-airmcp.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=heznpc-airmcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/heznpc-airmcp