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mcp_opendaw_repeat_notes

Repeat existing MIDI notes in a region multiple times, applying per-repeat transposition, velocity decay, and time gaps to build sequences, ostinatos, and motivic patterns.

Instructions

Repeat existing notes in a region N times with per-repeat transformations.

Takes the notes already in the region and copies them repeats times, each copy offset in time, pitch, and velocity. Unlike create_midi_echo (which decays feedback repeats), this tool preserves note structure and applies a uniform transform per repeat cycle — ideal for sequences, ostinato patterns, and motivic development.

Args: unit_index: Audio unit index track_index: Note track index region_index: Region index (-1 = first region) repeats: Number of repeat cycles (1-16, each cycle = full copy of source notes) transpose_semitones: Semitones added per repeat cycle (0=same, 12=octave up, -12=octave down, 7=fifth up). Cumulative. velocity_decay: Velocity multiplier per repeat (0=fade out, 1=constant, 0.8=gradual fade). Applied cumulatively. time_gap_beats: Extra gap between repeats in beats (0=back-to-back, 0.5=half-beat rest between cycles) direction: Transpose direction — "up" or "down" (affects sign of transpose) dest_track_index: Destination track (-1 = same track)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
repeatsNo
directionNoup
unit_indexYes
track_indexYes
region_indexNo
time_gap_beatsNo
velocity_decayNo
dest_track_indexNo
transpose_semitonesNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

With no annotations, the description carries the full burden of disclosing behavior. It explains the copy-and-transform mechanic, cumulative parameter effects (transpose, velocity decay, time gap), and note-structure preservation. However, it does not explicitly state whether original notes are retained or replaced, which is a minor transparency gap.

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

Conciseness5/5

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

The description is well-structured: a one-sentence summary, a behavioral explanation, and a detailed parameter list. Every sentence adds operational value, and the Args section is essential given the sparse schema. There is no filler or repetition.

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

Completeness4/5

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

For a tool with 9 parameters, no annotations, and an output schema, the description covers purpose, mechanics, parameter semantics, and usage context. It omits edge cases (e.g., behavior when region has no notes) but overall provides sufficient detail for an agent to invoke it correctly.

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?

The schema has 0% description coverage, but the Args section fully compensates by documenting all 9 parameters with units, ranges, and behavioral meaning (e.g., velocity_decay: '0=fade out, 1=constant, 0.8=gradual fade'). This is far richer than the bare schema definitions.

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 'Repeat existing notes in a region N times with per-repeat transformations', specifying the verb, resource, and scope. It explicitly contrasts with create_midi_echo, distinguishing this tool from a sibling and eliminating ambiguity about its function.

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

Usage Guidelines5/5

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

The description explicitly names create_midi_echo as an alternative and explains the difference: 'Unlike create_midi_echo (which decays feedback repeats), this tool preserves note structure and applies a uniform transform per repeat cycle'. It also lists ideal use cases (sequences, ostinato patterns, motivic development), giving concrete guidance on when to choose this tool.

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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