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jarahkon

hass-mcp-server

by jarahkon

ha_update_automation

Update an existing Home Assistant automation's configuration by specifying its ID and new settings. Enables precise automation management via the hass-mcp-server.

Instructions

Update an existing automation's configuration

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
automation_idYesThe automation config key/ID to update
configYesUpdated automation config (same format as create)
Behavior2/5

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

No annotations are provided. The description only says 'update' but does not disclose side effects, such as whether the entire config is replaced or if partial updates are allowed. No mention of permissions or consequences.

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?

Single sentence, front-loaded with the key action and resource. Efficient but could include a bit more context without losing conciseness.

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?

Given the tool has two parameters (one nested object) and no output schema, the description is somewhat incomplete. It does not explain the config format or what the tool returns. Additional context would help, but the schema partly compensates.

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

Parameters3/5

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

Schema coverage is 100%, so the baseline is 3. The description does not add any extra meaning beyond what the schema already provides for the parameters.

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?

The description clearly states the action (update) and the resource (existing automation's configuration). It distinguishes from create (ha_create_automation) and get (ha_get_automation) tools.

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?

No guidance on when to use this tool versus alternatives like create or delete. Prerequisites (e.g., automation must exist) are not mentioned. The description is too minimal to guide selection.

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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