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mcp_opendaw_create_synth_track

Create a synthesizer instrument track with a specified synth type and name, returning unit and track indices for use with creating notes.

Instructions

Create a new instrument audio unit with a synthesizer device and a note track.

Unlike create_instrument_track (which creates a Tape device for audio playback), this creates a MIDI synthesizer that responds to notes from create_note.

synth_type: 'vaporisateur' (subtractive synth, default), 'nano' (simple synth), 'soundfont' (SF2 player, needs sample), 'apparat' (FM synth). name: Display name for the instrument.

Returns unit_index and track_index for use with create_note.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
synth_typeYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

No annotations are provided, so the description carries the full burden. It states what is created (synth + note track) but does not disclose potential side effects, authorization needs, or error conditions. Adequate but not fully transparent.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise but could be more structured. It uses clear sentences and a list for synth types, but the comparison paragraph is slightly verbose. Overall good.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The output schema exists, and the description correctly mentions the return values (unit_index, track_index) and their purpose. It also provides enough context about what the tool does relative to sibling tools.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0%, so the description provides all meaning. It explains the 'name' parameter as the display name and describes each synth_type option in detail, even though the schema lacks enums.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool creates a synthesizer device and note track, and explicitly distinguishes it from create_instrument_track (which creates a Tape device). The different synth types are enumerated, making purpose very clear.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly contrasts with create_instrument_track, telling the agent when to use this tool vs an alternative. It also explains the synth_type options and notes that the output indices are for use with create_note, guiding subsequent usage.

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

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