// MCP TOOL REFERENCE

HOMEASSISTANT MCP TOOLS

13 tools from the HomeAssistant MCP MCP Server, categorised by risk level.

// ALL 13 HOMEASSISTANT MCP TOOLS

READ 2 tools

Read list_devices List all available Home Assistant devices with optional filtering by domain, area, or floor. Read system_info Get information about the MCP server including version and Home Assistant connection status.

WRITE 2 tools

Write lights_control Control lights in Home Assistant. List all lights, get state of a specific light, turn lights on with brigh... Write notify Send notifications through Home Assistant notification services.

EXECUTE 9 tools

Execute alarm_control Control alarm systems. Arm (home, away, night), disarm, or trigger alarms. Execute automation Manage Home Assistant automations. List all automations, toggle on/off, or trigger manually. Execute vacuum_control Control robot vacuums. Start, pause, stop, return to dock, clean spot, locate. Execute climate_control Control climate devices (thermostats, AC) in Home Assistant. List devices, get state, set HVAC mode, temper... Execute cover_control Control covers (blinds, curtains, garage doors). Open, close, stop, or set position. Execute fan_control Control fans. Turn on/off, set speed percentage, preset modes, oscillation. Execute lock_control Control locks. Lock, unlock, or open (for locks that support unlatching). Execute media_player_control Control media players. Play, pause, stop, volume control, and source selection. Execute scene Manage and activate Home Assistant scenes.

// FAQ

How many tools does the HomeAssistant MCP MCP server have? +

The HomeAssistant MCP MCP server exposes 13 tools across 3 categories: Read, Write, Execute.

How do I enforce policies on HomeAssistant MCP tools? +

Route the HomeAssistant MCP server through the PolicyLayer gateway. Define allow, deny, or approval rules per tool in the dashboard; they are enforced on every call before it reaches the server.

What risk categories do HomeAssistant MCP tools fall into? +

HomeAssistant MCP tools are categorised as Read (2), Write (2), Execute (9). Each category has a recommended default policy.

Enforce policy on every HomeAssistant MCP tool call.

Start from HomeAssistant MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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