set_track_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 states the operation is 'set' (implying mutation) but does not disclose potential side effects, error behavior on invalid track_index, or the expected color format. It also doesn't clarify if the operation can be undone or if it requires special permissions. This minimal disclosure leaves the agent unsure about consequences.

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 concise and front-loaded with the core purpose in the first sentence. The 'Args:' section is slightly redundant with the input schema but serves to explain parameter semantics. No unnecessary filler; each sentence earns its place.

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 simple setter with two parameters and an output schema, the description is minimally adequate but lacks crucial details. The color parameter's format is unspecified, which could cause misuse. The tool's behavior on out-of-range track_index is also unclear. Given the low schema coverage and absence of annotations, the description does not fully compensate for these gaps.

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?

The description adds valuable meaning to track_index by explaining it is 0-based with examples, which goes beyond the schema's bare integer type. However, color is only described as 'Color value,' providing no additional context about the acceptable format (e.g., hex string, RGB tuple). Since schema coverage is 0%, the description partially compensates but leaves a significant gap for the color parameter.

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 clearly states the tool's function with a specific verb and resource: 'Set the color of a track.' This distinguishes it from sibling tools like get_track_color (which retrieves) and rename_track (which changes a different property). The purpose is unambiguous and immediately understandable.

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 the tool is used when you want to change a track's color, but it does not explicitly state when to use it versus alternatives like get_track_color. No exclusions or prerequisites are mentioned, such as requiring an existing track or using get_track_color to verify the change.

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