select_rack_chain

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

With no annotations provided, the description carries the full burden for behavioral disclosure. It merely states the action 'Select' without explaining side effects, such as how selection affects subsequent operations, error behavior, or whether it changes the current selection state. This is a significant gap.

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 front-loaded with a one-sentence purpose followed by a clean, structured parameter list. Every line adds value with no redundancy or extraneous information.

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 selection tool with no output schema, the description adequately covers the action and parameter semantics but omits return values, error handling, and the relationship to sibling tools like get_rack_chains. It is minimally sufficient but leaves room for confusion about index sources.

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 schema provides only integer types with titles, and schema coverage is 0%. The description compensates by adding one-line meanings for each parameter: track_index, device_index, and chain_index. This is helpful but leaves implicit details like zero-based indexing and valid ranges.

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 purpose with a specific verb ('Select') and resource ('a chain in a rack device'). This distinguishes it from sibling selection tools like select_track, select_scene, and select_clip.

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 usage when selecting a rack chain but provides no explicit guidance on when to use it versus alternatives, prerequisites, or whether to first call get_rack_chains to obtain valid chain indices. It is concise but lacks instructive context.

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