set_device_parameter

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

With no annotations, the description carries the full burden. It discloses that value must be within min/max range and that indices are zero-based, which is useful. However, it does not mention potential errors when indices are invalid, whether the operation is reversible, or any side effects on playback. This is a moderate level of transparency for a mutation tool.

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 well-structured. It opens with a one-sentence purpose, adds a usage hint, and then presents an Args list with each parameter explained. No unnecessary words; every sentence contributes to understanding.

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?

The tool is a simple setter with four scalar parameters, no enums, and an output schema (implied). The description covers the purpose, prerequisite workflow, and parameter semantics completely, making it sufficient for the given complexity. The lack of explicit return-value description is mitigated by the existing output schema.

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 description coverage is 0%, so the description must compensate fully. It provides detailed semantics for all four parameters: track_index, device_index, parameter_index, and value, including zero-based indexing and the value range constraint. This completely explains each parameter's purpose and constraints.

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 'Set a specific parameter value on a device' with a specific verb and resource. The Args section further clarifies it's for a track's device chain, distinguishing it from sibling tools like set_master_device_parameter and set_return_device_parameter.

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 explicitly instructs 'Use get_device_parameters first to discover available parameters and their ranges,' providing a clear prerequisite and workflow. It does not explicitly exclude alternative setter tools for master/return devices, but the parameter names (track_index, device_index) imply the intended scope.

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