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jarahkon

hass-mcp-server

by jarahkon

ha_create_script

Create a new script in Home Assistant by providing a unique ID and configuration including alias, sequence, and optional settings like mode, description, icon, and fields.

Instructions

Create a new script in Home Assistant

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
object_idYesUnique script ID (e.g. 'morning_routine')
configYesScript config. Must include: alias, sequence. Optional: mode, description, icon, fields.
Behavior2/5

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 fails to mention idempotency, conflict behavior, or permission requirements. 'Create' implies mutation, but no further details.

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

Conciseness4/5

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

The description is concise at one sentence, but it could be more structured with additional details. It is front-loaded with the key action, but lacks efficiency in conveying more information.

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

Completeness3/5

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

Without output schema or annotations, the description is minimal. For a creation tool with nested parameters, more context about the effect and return behavior would improve completeness. The schema covers parameter descriptions, but broader context is missing.

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

Parameters4/5

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

The description adds meaningful context beyond the schema, specifying that config must include 'alias' and 'sequence' and listing optional fields. Schema coverage is 100%, but the description's clarifications raise its value above baseline.

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

Purpose4/5

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

The description 'Create a new script in Home Assistant' clearly states the verb and resource. However, it does not distinguish from sibling creation tools like ha_create_automation or ha_create_scene, which have similar purposes.

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

Usage Guidelines2/5

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, nor does it mention prerequisites or conditions for use. Sibling tools for creation exist, but no differentiation is given.

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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