set_track_color

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

With no annotations, the description fully carries behavioral disclosure. It states side effects (writes Track.color_index/Track.color in one undo step), verification (reads back), scope (clips are never recoloured), edge cases (WRONG_TYPE, VERIFICATION_FAILED), and explicitly notes the write is never retried. This is rich, transparent behavior.

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 structure is front-loaded and uses clear sections (Side effects, Example, Edge cases). It is appropriately sized, but the use of reStructuredText double-backticks adds minor noise.

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?

Given no output schema and no annotations, the description covers purpose, parameters, side effects, error codes, and failure behavior. Nothing critical is missing for an agent to call this tool correctly.

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 does: it gives valid ranges (color_index 0..69, color 0x000000..0xFFFFFF), specifies exactly one of the two is required, and provides examples like set_track_color(0, color_index=12). It also implies track_index identifies the track.

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 (Set and verify), resource (one track colour), and enumerates the two mutually exclusive parameter modes. It is easy to distinguish from siblings like set_clip_color or set_track_property, which target different resources.

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 clarifies when to provide color_index vs color (exactly one required) but doesn't explicitly name alternatives or when not to use this tool. Still, the mode constraints give clear usage context.

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