channel_set_color

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

With no annotations, the description carries the full burden of behavioral disclosure. It reveals that this is a mutating operation ('Set') and documents accepted color formats, but it does not mention side effects, return values, reversibility, or any requirements beyond the parameters themselves.

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 two short sentences with no wasted words. The primary purpose is front-loaded, and the only extra detail is directly useful for constructing valid parameter values.

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?

For a mutation tool with no annotations, no output schema, and incomplete parameter documentation, the description is too thin. An agent can guess that 'index' identifies the channel from context, but the description itself does not confirm that or provide enough surrounding behavioral context to make a confident invocation.

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 coverage is 0%, so the description must compensate. It adds concrete meaning for the 'color' parameter by specifying '#RRGGBB' or 'rgb(r,g,b)' formats. However, the 'index' parameter remains undocumented in both the schema and the description, leaving an important semantic gap.

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 clear, specific verb and resource: 'Set channel color.' It naturally distinguishes this from sibling tools like pattern_set_color, mixer_set_color, and playlist_set_track_color because it explicitly names the channel as the target.

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 when to use the tool: whenever a channel color needs to be changed. However, it provides no explicit guidance about when not to use it or how it compares to similarly named color-setting tools for patterns, mixer tracks, or playlists.

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