set_group_color_rgb

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

The annotations already declare this is a non-read-only, idempotent, non-destructive mutation. The description adds the useful RGB range of 0-255, but does not explain target resolution, error behavior, or what happens when a room/zone is not found.

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 definition is a single front-loaded sentence with no filler. It communicates the operation and RGB range efficiently.

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?

The annotations and output schema reduce the description burden, and the RGB range is covered. However, the critical question of how the room or zone is selected through group_id or group_name is left to the bare schema titles.

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 explain five parameters. It only clarifies the red, green, and blue range, and says nothing about group_id versus group_name, their optionality, or precedence when both are supplied.

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 states a specific verb and resource: set the color of a room or zone from RGB components. It distinguishes the group target from an individual light, but does not explicitly contrast with siblings such as set_color_rgb or set_group_color.

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?

It gives no guidance on when to use RGB rather than named colors, XY, or color temperature, and does not mention when to prefer set_group_color or set_color_rgb. Usage is only implied by the operation itself.

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