# send_command

Send a command (ON, OFF, numeric value, etc.) to a single item.

Agent View of the PolicyLayer registry record for `send_command`. HTML page: https://policylayer.com/tools/deswong-openhab-mcp/send-command

## Facts

- Tool: `send_command`
- Server: Openhab (`deswong/openhab-mcp`) — https://policylayer.com/tools/deswong-openhab-mcp.md
- Homepage: https://github.com/deswong/Openhab-MCP
- 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": "send_command",
    "arguments": {}
  }
}
```

## Why send_command is rated High

Sending commands to OpenHAB items triggers real-world effects on smart home devices (lights, locks, thermostats, switches, etc.). This is an Execute action because it dispatches commands whose effects depend on the target item and value. Misuse could unlock doors, disable alarms, alter HVAC, or trigger unsafe states — hence high severity.

From the tool's own definition: "'Send a command (ON, OFF, numeric value, etc.) to a single item' — triggers external operations on physical/virtual home automation devices"

## Use case

AI agents invoke send_command to trigger actions in Openhab. 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 Openhab:

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

## Other tools on Openhab (24)

- `manage_item` — Destructive — https://policylayer.com/tools/deswong-openhab-mcp/manage-item.md
- `manage_rule` — Destructive — https://policylayer.com/tools/deswong-openhab-mcp/manage-rule.md
- `manage_thing` — Destructive — https://policylayer.com/tools/deswong-openhab-mcp/manage-thing.md
- `manage_ui` — Destructive — https://policylayer.com/tools/deswong-openhab-mcp/manage-ui.md
- `automation` — Execute — https://policylayer.com/tools/deswong-openhab-mcp/automation.md
- `control_media` — Execute — https://policylayer.com/tools/deswong-openhab-mcp/control-media.md
- `execute_batch` — Execute — https://policylayer.com/tools/deswong-openhab-mcp/execute-batch.md
- `manage_system` — Execute — https://policylayer.com/tools/deswong-openhab-mcp/manage-system.md
- `remediate` — Execute — https://policylayer.com/tools/deswong-openhab-mcp/remediate.md
- `schedule_command` — Execute — https://policylayer.com/tools/deswong-openhab-mcp/schedule-command.md
- `analyze_home` — Read — https://policylayer.com/tools/deswong-openhab-mcp/analyze-home.md
- `diagnose_item` — Read — https://policylayer.com/tools/deswong-openhab-mcp/diagnose-item.md
- `generate_home_blueprint` — Read — https://policylayer.com/tools/deswong-openhab-mcp/generate-home-blueprint.md
- `get_system_summary` — Read — https://policylayer.com/tools/deswong-openhab-mcp/get-system-summary.md
- `initial_discovery` — Read — https://policylayer.com/tools/deswong-openhab-mcp/initial-discovery.md
- `manage_logs` — Read — https://policylayer.com/tools/deswong-openhab-mcp/manage-logs.md
- `mcp_status` — Read — https://policylayer.com/tools/deswong-openhab-mcp/mcp-status.md
- `query_items` — Read — https://policylayer.com/tools/deswong-openhab-mcp/query-items.md
- `query_rules` — Read — https://policylayer.com/tools/deswong-openhab-mcp/query-rules.md
- `query_things` — Read — https://policylayer.com/tools/deswong-openhab-mcp/query-things.md
- `resolve_item` — Read — https://policylayer.com/tools/deswong-openhab-mcp/resolve-item.md
- `manage_link` — Write — https://policylayer.com/tools/deswong-openhab-mcp/manage-link.md
- `manage_persistence` — Write — https://policylayer.com/tools/deswong-openhab-mcp/manage-persistence.md
- `manage_scene` — Write — https://policylayer.com/tools/deswong-openhab-mcp/manage-scene.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=deswong-openhab-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/deswong-openhab-mcp