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mcp_opendaw_create_breakbeat

Create syncopated breakbeat drum patterns for jungle, DnB, big beat, and 2-step, with selectable break types and MIDI parameters.

Instructions

Create a breakbeat pattern — the syncopated skeleton of jungle, DnB, big beat, and breakbeat hardcore.

Breakbeats are "broken" drum patterns where the snare and kick don't sit on clean quarter notes. Instead they syncopate, stutter, and displace — creating the forward-leaning momentum that powered hip-hop's early years (Amen break), then jungle/DnB (160-180 BPM chopped breaks), big beat (Fatboy Slim, Prodigy), and UK garage/2-step.

breakbeat_type: "amen" — The Amen break: G.C. Coleman's performance in The Winstons "Amen, Brother" (1969). The most sampled 6-second loop in history. Kick at 0, 2.66; snare at 1, 3; ghost snare at 2.66. Hats on 8ths. The DNA of jungle and DnB. "dnb" — Drum & bass: chopped Amen-style at DnB tempo. Kick on 0 and 2.5, snare on 1 and 3, rapid 16th hats, ghost snares on the "e" and "a". Rolling, driving. Andy C / Noisia style. "big_beat" — Big beat: mid-tempo (120-130) fat breaks. Kick on 0 and 2.66, snare on 1 and 3, with a kick+snare syncopation on beat 2. Big, swaggering. Fatboy Slim / Prodigy "Firestarter". "2_step" — UK garage 2-step: kick on 1 and 3, snare on 2 and 4, but the second kick is shifted to 2.66 and there's a ghost snare on 3.5. Swung 16ths. The "skipping" feel. MJ Cole / Disclosure style. "funky_drummer" — Clyde Stubblefield's break from James Brown "Funky Drummer" (1970). Kick at 0, 2, 2.66; snare at 1, 3; hats throughout with ghost notes. The most funk-sampled break. Public Enemy, NWA, LL Cool J all built on this.

bars: Pattern length (2-16, 2 = one breakbeat cycle). kick_pitch: MIDI pitch for kick (36 = C1). snare_pitch: MIDI pitch for snare (38 = D1). hat_pitch: MIDI pitch for hi-hats (42 = F#1). ghost_pitch: MIDI pitch for ghost snares (37 = F#1, side-stick). velocity: Base velocity 0-1. Snares -0.05, hats -0.15, ghosts -0.3.

Returns notes created, breakbeat type, and stroke breakdown.

Example: create_breakbeat(breakbeat_type="amen", track_index=0) create_breakbeat(breakbeat_type="dnb", track_index=1, bars=4)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
barsNo
velocityNo
hat_pitchNo
kick_pitchNo
start_beatNo
unit_indexNo
ghost_pitchNo
snare_pitchNo
track_indexNo
breakbeat_typeNoamen

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

With no annotations, the description carries the full burden. It transparently discloses the musical behavior, including per-subtype note placements and velocity adjustments. However, it is silent on placement mechanics (track_index, start_beat) and whether existing notes are overwritten or added, leaving uncertainty about side effects.

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 well-structured with a clear lead, bullet-like breakbeat_type details, parameter explanations, and an example. It is long but each section serves a purpose; the historical context, while informative, could be trimmed slightly. Overall, it is a high-value description that earns its length.

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

Completeness3/5

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

The core creation behavior and musical content are thoroughly covered, and the output schema covers return values. However, key parameters like start_beat and unit_index are not explained, and there is no mention of how the pattern integrates into an existing project (e.g., whether it overwrites a region). These gaps make the description incomplete for a tool with 10 parameters and no annotation support.

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

Parameters4/5

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

Since the schema has 0% description coverage, the description compensates well for most parameters: breakbeat_type values are exhaustively detailed, and bars, pitches, and velocity are explained with defaults. However, start_beat and unit_index are entirely undocumented, and track_index only appears in the example without semantic explanation, leaving some parameters underspecified.

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

Purpose4/5

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

The description clearly states the tool's purpose: 'Create a breakbeat pattern' and elaborates on specific subtypes (amen, dnb, big_beat, etc.). However, it does not explicitly distinguish itself from sibling tools like create_drum_fill or create_break, so it falls short of the highest score for sibling differentiation.

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 gives strong contextual guidance on when each breakbeat_type is appropriate, linking them to genres and artists (e.g., 'The DNA of jungle and DnB'). It does not provide explicit exclusions or alternatives, but the context is clear enough for an agent to decide when to use 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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