select_rack_chain

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

No annotations are provided, and the description does not disclose behavioral traits beyond the basic selection action. It fails to mention whether this operation is read-only or modifies state (e.g., changes the active chain), any visual feedback, or permission requirements.

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 short but includes a parameter list that is largely redundant with the input schema. While not overly verbose, it could be more concise by integrating parameter explanations into a single sentence, or alternatively, it could omit the list entirely if the schema is self-explanatory.

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 three required parameters, no output schema, and no annotations, the description lacks context about what a rack device and chain are, how selection works, and what the result of selection is. It is insufficient for an agent to fully understand the tool's behavior and prerequisites.

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 repeats parameter names with trivial explanations ('The index of the track') that add no meaning beyond the schema parameter titles. With 0% schema description coverage, the description should provide value like valid ranges, zero-based indexing, or how indices relate to each other, which it does not.

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 action ('Select') and the resource ('a chain in a rack device'). It differentiates from sibling tools like 'select_clip', 'select_scene', and 'select_track' by specifying the context of a rack device.

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 provides no guidance on when to use this tool versus alternative selection tools or when not to use it. It lacks explanations of prerequisites or context, such as the need for a rack device to exist or the difference between selecting a chain and selecting a clip/track.

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