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mcp_opendaw_create_montuno

Generate a syncopated Latin/jazz piano montuno pattern with customizable chords, clave rhythm, and accent beats for authentic salsa, mambo, or guajira grooves.

Instructions

Create a montuno — a repeating Latin/jazz piano ostinato pattern.

A montuno is a 2-bar (or 4-bar) repeating piano figure central to son, salsa, Latin jazz, and mambo. It consists of syncopated chord stabs and single-note passages that lock with the clave, creating a driving, danceable groove.

Unlike arpeggiators (which cycle through chord tones mechanically) or ostinato patterns (which repeat a fixed melodic cell), a montuno combines:

  • Harmonic movement through a chord progression

  • Syncopated rhythm locked to the clave

  • Alternation between chord stabs and melodic passage notes

  • Call-and-response phrasing within each bar

Pattern types: 2-3 — Classic 2-3 clave montuno (2-side in bar 1, 3-side in bar 2) 3-2 — Reverse clave (3-side first, 2-side second) guajira — Cuban guajira montuno (gentler, dotted rhythm feel) charanga — Charanga-style (more melodic, flowing passages)

Rhythm: 8th — Eighth-note based (standard salsa) 16th — Sixteenth-note based (faster, busier) quarter — Quarter-note based (simpler, mambo style)

Args: root: Root note name (C, C#, D, ...). scale: Scale name (major, minor, dorian, mixolydian, harmonic_minor). bars: Number of bars (2 or 4). Montunos are typically 2-bar cycles. octave: Starting MIDI octave (2-6). chord_prog: Comma-separated chord progression (e.g., "C,Am,Dm,G"). If empty, generates a I-vi-IV-V progression in the key. pattern: Pattern type (2-3, 3-2, guajira, charanga). rhythm: Rhythm subdivision (8th, 16th, quarter). velocity: Base velocity 0-1. accent_beats: Comma-separated beat numbers to accent (1-indexed). unit_index: AU index. track_index: Note track index. start_beat: Starting beat position.

Returns notes created, chord progression, and pattern info.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
barsNo
rootNoC
scaleNomajor
octaveNo
rhythmNo8th
patternNo2-3
velocityNo
chord_progNo
start_beatNo
unit_indexNo
track_indexNo
accent_beatsNo1,3

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 must disclose behavior fully. It explains what a montuno is, pattern types, rhythm options, and return value data. However, it does not mention side effects (e.g., whether it overwrites existing notes), performance impact, or error conditions. The disclosure is adequate but not exhaustive.

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 lengthy but well-structured with clear sections (definition, comparison, pattern types, rhythm, args). Each sentence adds value; however, some repetition could be trimmed. Overall, the structure aids readability without being overly verbose.

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?

Given the tool's complexity (12 parameters, multiple pattern types, rhythm options) and the existence of an output schema, the description covers the key aspects: creation, parameter meanings, return value summary. It could mention default chords or typical use cases more, but is largely sufficient.

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 input schema has 12 parameters with 0% description coverage. The description lists every parameter with its meaning, examples, defaults, and in some cases allowed values (pattern types, rhythm subdivisions). This adds substantial meaning beyond the schema and fully compensates for the lack of schema descriptions.

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 it creates a montuno pattern, defines what a montuno is, and explicitly distinguishes it from arpeggiators and ostinato patterns. The verb 'create' and resource 'montuno' are specific, and the description differentiates from siblings by focusing on Latin/jazz piano ostinato patterns.

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 explains when to use the tool (for Latin/jazz piano patterns) and contrasts with arpeggiators and ostinatos, providing context. However, it does not explicitly state when not to use it or compare with specific sibling tools, though the contrast helps guide 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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