# call_service

Call a Home Assistant service, for example domain='light', service='turn_on'.

Agent View of the PolicyLayer registry record for `call_service`. HTML page: https://policylayer.com/tools/mcp-control-plane/call-service

## Facts

- Tool: `call_service`
- Server: Mcp Control Plane (`albertik322-sudo/mcp-control-plane`) — https://policylayer.com/tools/mcp-control-plane.md
- Homepage: https://github.com/albertik322-sudo/mcp-control-plane
- Risk category: Execute (High 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": "call_service",
    "arguments": {}
  }
}
```

## Why call_service is rated High

This tool triggers external operations in Home Assistant (smart home devices, automations, etc.). While some calls are benign (turn on a light), the same interface can control locks, alarms, thermostats, or other critical home systems. The effects depend heavily on the arguments passed, and some actions (e.g., unlocking doors, disabling alarms) can have serious real-world consequences.

From the tool's own definition: "'Call a Home Assistant service, for example domain=\'light\', service=\'turn_on\'.'"

## Use case

AI agents invoke call_service to trigger actions in Mcp Control Plane. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "call_service": {
      "limits": [
        {
          "counter": "call_service_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Mcp Control Plane (285)

- `request_durable_task_cancel` — Destructive — https://policylayer.com/tools/mcp-control-plane/request-durable-task-cancel.md
- `steam_rom_manager_cli` — Destructive — https://policylayer.com/tools/mcp-control-plane/steam-rom-manager-cli.md
- `steam_rom_manager_nuke` — Destructive — https://policylayer.com/tools/mcp-control-plane/steam-rom-manager-nuke.md
- `steam_rom_manager_remove` — Destructive — https://policylayer.com/tools/mcp-control-plane/steam-rom-manager-remove.md
- `activate_window` — Execute — https://policylayer.com/tools/mcp-control-plane/activate-window.md
- `admin_run` — Execute — https://policylayer.com/tools/mcp-control-plane/admin-run.md
- `api_sentence` — Execute — https://policylayer.com/tools/mcp-control-plane/api-sentence.md
- `apply_unified_patch_remote` — Execute — https://policylayer.com/tools/mcp-control-plane/apply-unified-patch-remote.md
- `apt_maintenance` — Execute — https://policylayer.com/tools/mcp-control-plane/apt-maintenance.md
- `click` — Execute — https://policylayer.com/tools/mcp-control-plane/click.md
- `click_at` — Execute — https://policylayer.com/tools/mcp-control-plane/click-at.md
- `click_in_window` — Execute — https://policylayer.com/tools/mcp-control-plane/click-in-window.md
- `comfy_generate_from_asset` — Execute — https://policylayer.com/tools/mcp-control-plane/comfy-generate-from-asset.md
- `comfy_interrupt` — Execute — https://policylayer.com/tools/mcp-control-plane/comfy-interrupt.md
- `comfy_restart` — Execute — https://policylayer.com/tools/mcp-control-plane/comfy-restart.md
- `deck_exec` — Execute — https://policylayer.com/tools/mcp-control-plane/deck-exec.md
- `deck_probe` — Execute — https://policylayer.com/tools/mcp-control-plane/deck-probe.md
- `dns_test` — Execute — https://policylayer.com/tools/mcp-control-plane/dns-test.md
- `docker_compose` — Execute — https://policylayer.com/tools/mcp-control-plane/docker-compose.md
- `docker_container_action` — Execute — https://policylayer.com/tools/mcp-control-plane/docker-container-action.md
- `docker_exec` — Execute — https://policylayer.com/tools/mcp-control-plane/docker-exec.md
- `double_click` — Execute — https://policylayer.com/tools/mcp-control-plane/double-click.md
- `drag_to` — Execute — https://policylayer.com/tools/mcp-control-plane/drag-to.md
- `focus_window_win32` — Execute — https://policylayer.com/tools/mcp-control-plane/focus-window-win32.md
- `hold_key` — Execute — https://policylayer.com/tools/mcp-control-plane/hold-key.md
- `hotkey` — Execute — https://policylayer.com/tools/mcp-control-plane/hotkey.md
- `install_flatpak_emulators` — Execute — https://policylayer.com/tools/mcp-control-plane/install-flatpak-emulators.md
- `key_down` — Execute — https://policylayer.com/tools/mcp-control-plane/key-down.md
- `key_up` — Execute — https://policylayer.com/tools/mcp-control-plane/key-up.md
- `launch_app` — Execute — https://policylayer.com/tools/mcp-control-plane/launch-app.md
- …and 255 more: https://policylayer.com/tools/mcp-control-plane.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=mcp-control-plane · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/mcp-control-plane