set_chain_mixer_value

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

No annotations are present, so the description must carry the transparency burden. It only says 'set' with no information about side effects, reversibility, validation, or required conditions (e.g., device must be a rack with chains). This is a mutation tool with no safety context.

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 docstring is efficient and front-loaded: a one-line purpose followed by a compact Args block. Each parameter gets a single line, and no unnecessary content is included. The structure is clean and scannable.

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?

While the parameter semantics are well covered, the description lacks any context on when this tool is appropriate (e.g., vs. track-level mixer control), what conditions are required (valid indices, rack with chains), or any behavioral caveats. The output schema presumably covers returns, but for a 6-parameter tool, more contextual guidance is expected.

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 provides crucial semantics absent from the schema: zero-based indexing for track/device/chain, the allowed values for parameter_name, and the conditional send_index when parameter_name='send'. This compensates for the schema's 0% coverage, though the 'value' parameter is vaguely described as 'New value' without range or type details.

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 ('Set a rack chain mixer parameter') and enumerates the parameter types ('chain_activator', 'pan', 'volume', 'send'), which distinguishes it from sibling tools like set_track_volume or set_device_parameter. It is specific but assumes familiarity with what a chain mixer is, so it's not a 5.

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?

No guidance is provided on when to use this tool versus alternatives such as set_track_volume, set_track_pan, or set_device_parameter. The description only names the operation and parameters, leaving the agent to infer context, with no explicit exclusions or alternative scenarios.

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