Create DJ-style decks

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

Annotations already declare readOnly=false, openWorld=true, destructive=false. The description adds architectural details: per-deck gains, FX-send bus, Switch for cuts, Cross chain, and output as a Null. It also notes test sources are auto-created, giving behavioral insight beyond annotations.

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?

Four dense sentences front-loaded with the main purpose. Each sentence adds architectural information without fluff; could be more scannable but is well within acceptable length.

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 complex 8-parameter builder with no output schema, the description explains both modes, the internal network, output type (Null), and test-source fallback. It lacks edge-case error handling but is otherwise sufficient.

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 100% with detailed per-parameter descriptions, so the baseline is 3. The description connects parameters to the topology (e.g., cut_mix relates to the Switch and final Cross) but doesn't add new format or syntax details beyond what schemas provide.

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 opens with 'Build a DJ-style VJ mixer' – a specific verb and resource. It then clearly distinguishes two build modes (legacy A/B vs 2-8 deck) and names concrete TOP elements, which separates it from sibling tools like create_layer_mixer.

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 clearly describes the tool's role in building a mixer and explains when each mode applies (with/without decks[]), but it does not explicitly compare to alternatives like create_layer_mixer or state exclusions, so context is clear but alternatives are not named.

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