// SCAN REPORT

Hass-MCP

16 tools. 3 can modify or destroy data without limits.

3 write tools that can modify data. Rate limits recommended.

Last updated: 11 Jun 2026

3 can modify or destroy data

13 read-only

16 tools total

Community server · catalogue entry verified 11/06/2026

How to control Hass-MCP ↓

TOOL MAP

Read (13) Write / Execute (3) Destructive / Financial (0)

MOST DANGEROUS TOOLS

High Risk

Execute · High restart_ha This tool executes a restart of the Home Assistant system itself, which is an irreversible operation in the sense that it will interrupt all running automations, queries, and smart home controls until the restart complet Execute · High call_service_tool This tool executes arbitrary Home Assistant service calls via low-level API access. Execute · High entity_action The tool name 'entity_action' strongly implies triggering actions on smart home entities (e.g., turning on/off lights, locks, alarms, thermostats).

3 of Hass-MCP's 16 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

HOW TO CONTROL HASS-MCP

PolicyLayer is an MCP gateway — it sits between your AI agents and Hass-MCP, and nothing reaches the server without passing your rules. These are the rules we recommend:

Cap read operations

{
  "domain_summary_tool": {
    "limits": [
      {
        "counter": "domain_summary_tool_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Hass-MCP — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON HASS-MCP →

Free to start. No card required.

ALL 16 HASS-MCP TOOLS

EXECUTE 3 tools

Execute restart_ha Restart Home Assistant ⚠️ WARNING: Temporarily disrupts all Home Assistant operations Return Execute call_service_tool Call any Home Assistant service (low-level API access) Args: domain: The domain of the servic Execute entity_action entity_action

READ 13 tools

Read domain_summary_tool domain_summary_tool Read get_entities_by_area get_entities_by_area Read get_entity get_entity Read get_error_log get_error_log Read get_history get_history Read get_history_range get_history_range Read get_statistics get_statistics Read get_statistics_range get_statistics_range Read get_version get_version Read list_automations Get a list of all automations from Home Assistant This function retrieves all automations configured Read list_entities list_entities Read search_entities_tool search_entities_tool Read system_overview Get a comprehensive overview of the entire Home Assistant system Returns: A dictionary contai

RELATED SERVERS

Other MCP servers with similar tools — same risk classification, starter policies for each.

FAQ

Is the Hass- MCP server safe to use without restrictions? +

The Hass-MCP server is primarily read-only with 13 read tools. While it cannot modify data, an agent in a retry loop can make thousands of API calls per minute, exhausting rate limits and running up costs. Rate limiting is still recommended.

How many tools does the Hass- MCP server expose? +

16 tools across 2 categories: Execute, Read. 13 are read-only. 3 can modify, create, or delete data.

How do I enforce a policy on Hass-MCP? +

Register the Hass- MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Hass-MCP tool call.

Deterministic rules across all 16 Hass-MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON HASS-MCP →

Free to start. No card required.

16 Hass-MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

Hass-MCP

// TOOL MAP

// MOST DANGEROUS TOOLS

// HOW TO CONTROL HASS-MCP

// ALL 16 HASS-MCP TOOLS

// RELATED SERVERS

// FAQ