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entity_action

Control smart home devices by turning them on, off, or toggling. Supports additional parameters like brightness or temperature.

Instructions

Perform an action on a Home Assistant entity (on, off, toggle)

Args: entity_id: The entity ID to control (e.g. 'light.living_room') action: The action to perform ('on', 'off', 'toggle') params: Optional dictionary of additional parameters for the service call

Returns: The response from Home Assistant

Examples: entity_id="light.living_room", action="on", params={"brightness": 255} entity_id="switch.garden_lights", action="off" entity_id="climate.living_room", action="on", params={"temperature": 22.5}

Domain-Specific Parameters: - Lights: brightness (0-255), color_temp, rgb_color, transition, effect - Covers: position (0-100), tilt_position - Climate: temperature, target_temp_high, target_temp_low, hvac_mode - Media players: source, volume_level (0-1)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
actionYes
paramsNo
entity_idYes
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, so description carries full burden. Discloses optional params and domain-specific details, but does not mention side effects, permissions, or async behavior. Adequate for basic actions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Well-structured with clear sections, examples, and domain-specific info. Front-loaded purpose, no redundant sentences.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Covers main actions, examples, and domain-specific params. Could mention error handling or constraints, but overall complete for typical use.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0%, description compensates fully. Explains entity_id, action values, and provides extensive domain-specific parameter details (brightness, color_temp, etc.) for params.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description clearly states verb 'Perform an action' and resource 'Home Assistant entity', with specific action values (on, off, toggle). Distinguishes from siblings like call_service_tool.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides examples and domain-specific parameters, giving strong implicit guidance. Does not explicitly state when not to use or compare to alternatives, but examples clarify typical usage.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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