使用 AI 助手控制家庭助手设备的模型上下文协议 (MCP) 集成。
此 MCP 允许 AI 助手控制您的 Home Assistant 设备。它提供以下工具：
在您的 Home Assistant 实例中搜索实体
控制设备（打开/关闭）
控制灯光颜色和亮度
Related MCP server: Hass-MCP
Python 3.11 或更高版本
Home Assistant 实例正在运行并可通过 API 访问
Home Assistant 长期访问令牌
克隆此存储库
设置 Python 环境：
cd home-assistant
python -m venv .venv
source .venv/bin/activate # On Windows: .venv\Scripts\activate
pip install -U pip
pip install uv
uv pip install -e .转到您的 Home Assistant 实例
导航到您的个人资料（单击侧栏中的用户名）
向下滚动到“长寿命访问令牌”
创建一个具有描述性名称的新令牌，例如“MCP Integration”
复制令牌（您只会看到一次）
将以下配置添加到 Cursor 中的 MCP 配置中：
{
"mcpServers": {
"home_assistant": {
"command": "uv",
"args": [
"--directory",
"/path/to/your/home-assistant-mcp",
"run",
"main.py"
],
"env": {
"HOME_ASSISTANT_TOKEN": "your_home_assistant_token_here"
},
"inheritEnv": true
}
}
}代替：
/path/to/your/home-assistant替换为该目录的实际路径
your_home_assistant_token_here与您的 Home Assistant 长期访问令牌
默认情况下，MCP 尝试通过http://homeassistant.local:8123连接到 Home Assistant。
如果您的 Home Assistant 位于不同的 URL，您可以修改app/config.py中的HA_URL变量。
配置完成后，您可以使用 Cursor AI 来控制您的 Home Assistant 设备：
搜索设备：“查找我的客厅灯”
控制设备：“打开厨房灯”
控制灯光颜色：“将我的客厅灯设置为红色”
调整亮度：“将餐厅灯光设置为蓝色，亮度为 50%”
MCP 现在支持高级灯光控制功能：
颜色控制：为兼容灯设置任意 RGB 颜色
使用 RGB 值指定颜色（每个成分为 0-255）
例如： set_device_color("light.living_room", 255, 0, 0)表示红色
亮度控制：调节灯光亮度
可选亮度参数（0-255）
可以与颜色变化结合
例如： set_device_color("light.dining_room", 0, 0, 255, brightness=128)表示中等亮度的蓝色
如果出现身份验证错误，请验证您的令牌是否正确且未过期
检查您的 Home Assistant 实例是否可以通过配置的 URL 访问
对于颜色控制问题：
验证您的灯光实体是否支持 RGB 颜色控制
尝试改变颜色之前，请检查灯是否已打开
当前实施需要两步过程来控制设备：
使用自然语言搜索实体
使用其特定的entity_id控制实体
计划中的增强功能是创建一种更加动态的方式将实体暴露给控制设备工具，从而使 AI 能够：
通过更自然的命令直接控制设备（例如“关闭厨房灯”）
缓存常用实体以便更快地访问
支持更复杂的操作，如调整亮度、温度或其他属性
更直观地处理实体组和场景
这将大大减少操作时间，并在通过 AI 助手控制 Home Assistant 设备时创造更加无缝的用户体验。
Control a Home Assistant entity by turning it on or off.
Args:
entity_id: The Home Assistant entity ID to control (format: domain.entity)
state: The desired state ('on' or 'off')
| Name | Required | Description | Default |
|---|---|---|---|
| entity_id | Yes | ||
| state | Yes |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the action ('turning it on or off') but lacks critical details: it doesn't mention permissions required, whether this is a destructive operation (e.g., if turning off a device has irreversible effects), rate limits, error handling, or what happens upon success/failure. For a mutation tool with zero annotation coverage, this is a significant gap in transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is appropriately sized and front-loaded: the first sentence states the core purpose, and the 'Args' section efficiently documents parameters without unnecessary details. Every sentence earns its place, making it easy to scan and understand quickly.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's moderate complexity (2 parameters, mutation operation, no output schema), the description is partially complete. It covers the basic purpose and parameter semantics but lacks behavioral details (e.g., side effects, permissions) and usage guidelines. Without annotations or output schema, it leaves gaps that could hinder an agent's ability to use the tool effectively in varied contexts.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The description adds meaningful semantics beyond the input schema, which has 0% description coverage. It explains that 'entity_id' is a Home Assistant entity ID with a specific format ('domain.entity') and that 'state' accepts 'on' or 'off' values. This clarifies the purpose and constraints of both parameters, compensating well for the schema's lack of descriptions.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose: 'Control a Home Assistant entity by turning it on or off.' This specifies the verb ('control'), resource ('Home Assistant entity'), and action ('turning it on or off'), making it easy to understand. However, it doesn't explicitly differentiate from sibling tools like 'set_device_color' (which might control color instead of on/off state), so it misses the highest score.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no guidance on when to use this tool versus alternatives. It doesn't mention sibling tools like 'search_entities' (which might be for finding entities) or 'set_device_color' (which might control color settings), nor does it specify prerequisites, exclusions, or contextual cues for usage. This leaves the agent with minimal direction.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Search for Home Assistant entities matching a natural language description.
Args:
description: Natural language description of the entity (e.g., "office light", "kitchen fan")
Returns:
A list of matching entity IDs with their friendly names, or an error message
| Name | Required | Description | Default |
|---|---|---|---|
| description | Yes |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It describes the search operation and return format (list of entity IDs with friendly names or error message), which adds useful context. However, it lacks details on permissions, rate limits, or error conditions, leaving some behavioral aspects unspecified for a tool with no annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is appropriately sized and front-loaded, with a clear purpose statement followed by structured sections for arguments and returns. Every sentence earns its place by providing essential information without redundancy, making it efficient and easy to parse.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's low complexity (1 parameter, no output schema, no annotations), the description is mostly complete. It covers purpose, usage, parameter semantics, and return values adequately. However, it could benefit from more behavioral details (e.g., search scope, limitations) to fully compensate for the lack of annotations and output schema.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The description adds significant meaning beyond the input schema, which has 0% coverage. It explains the 'description' parameter as a natural language description with examples ('office light', 'kitchen fan'), clarifying its purpose and format. This compensates well for the schema's lack of documentation, though it doesn't cover all possible edge cases.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose with a specific verb ('Search') and resource ('Home Assistant entities'), and distinguishes it from siblings by focusing on search functionality rather than control or configuration. It specifies the search is based on natural language descriptions, which is a distinct operation from the sibling tools.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context for when to use this tool (searching for entities by natural language description), but does not explicitly mention when not to use it or name alternatives. It implies usage for discovery purposes, which is helpful but lacks explicit exclusions or comparisons to sibling tools like control_device or set_device_color.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Set the color and optionally brightness of a light entity.
Args:
entity_id: The Home Assistant entity ID to control (format: light.entity)
red: Red component (0-255)
green: Green component (0-255)
blue: Blue component (0-255)
brightness: Optional brightness level (0-255)
| Name | Required | Description | Default |
|---|---|---|---|
| entity_id | Yes | ||
| red | Yes | ||
| green | Yes | ||
| blue | Yes | ||
| brightness | No |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. It states this is a write operation ('Set') but doesn't mention permissions, side effects, error conditions, or response format. While it specifies the action, it lacks critical behavioral details like whether this requires authentication, what happens on invalid inputs, or if changes are reversible.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is front-loaded with the core purpose in the first sentence, followed by a structured parameter list. Every sentence earns its place by clarifying parameter details without redundancy. It's appropriately sized for a tool with multiple parameters.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no annotations and no output schema, the description covers the action and parameters well but lacks behavioral context (e.g., error handling, permissions) and return values. For a write operation with 5 parameters, this is minimally adequate but leaves gaps in understanding full tool behavior.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, so the description must fully compensate. It provides clear semantics for all 5 parameters: entity_id format ('light.entity'), RGB component ranges (0-255), and brightness as optional with range. This adds essential meaning beyond the bare schema, which only shows types and titles without context.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the specific action ('Set the color and optionally brightness') and target resource ('a light entity'), distinguishing it from sibling tools like 'control_device' (more generic) and 'search_entities' (read-only). The verb 'set' is precise and indicates a write operation.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage for controlling light color/brightness but doesn't explicitly state when to use this tool versus 'control_device' (which might handle other device types or operations) or 'search_entities' (for discovery). No explicit alternatives, prerequisites, or exclusions are provided, leaving usage context somewhat ambiguous.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
v1.0.0control_device1 field changedInput schema / titleAdded value: +"control_deviceArguments"search_entities1 field changedInput schema / titleAdded value: +"search_entitiesArguments"set_device_color1 field changedInput schema / titleAdded value: +"set_device_colorArguments"control_devicesearch_entitiesset_device_colorScored across 3 tools
Each tool has a clearly distinct purpose with no overlap. control_device handles basic on/off states, search_entities finds devices by description, and set_device_color manages color/brightness for lights. An agent can easily distinguish when to use each tool based on the specific operation needed.
All three tools follow a consistent verb_noun pattern with snake_case throughout: control_device, search_entities, and set_device_color. The naming is predictable and follows the same grammatical structure, making the tool set easy to understand at a glance.
With only 3 tools, this feels thin for a Home Assistant integration that presumably manages many device types and operations. While the tools cover basic control, search, and color settings, the scope suggests more operations would be needed for comprehensive home automation coverage. The count is borderline minimal for the domain.
There are significant gaps in the tool surface for home automation. Missing operations include getting device status/state, adjusting non-color attributes (like temperature for thermostats or speed for fans), managing scenes/automations, and handling other entity types beyond lights. The current tools provide only partial coverage of the Home Assistant domain.
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