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mcp_opendaw_create_call_and_response

Create call-and-response musical phrases on two tracks, with response types including echo, transpose, variation, complementary, and fill.

Instructions

Create call-and-response — two phrases in musical dialogue.

Call-and-response is the most fundamental musical conversation: a leader phrase (call) followed by a response phrase. Root of blues, gospel, African music, jazz, work songs, and hip-hop.

Response types:

  • echo: exact repeat of the call (African tradition, gospel)

  • transpose: repeat transposed by response_interval semitones (blues, jazz — response at IV or V)

  • variation: same pitches, varied rhythm (jazz, bebop)

  • complementary: contrasting phrase using scale degrees (gospel, soul — response "answers" the call)

  • fill: shorter response — last note only, or 2-note fill (blues turnaround, funk fills)

Call pattern: space-separated scale degrees (0=root, 2=2nd, etc.). Call rhythm: space-separated durations in beats. Response interval: for transpose type, semitones to shift (5 = perfect 4th up, 7 = perfect 5th up, -5 = 4th down). Pairs: number of call-response pairs. Gap beats: silence between call and response.

Creates call on track_index, response on track_index+1.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pairsNo
key_rootNoC
velocityNo
gap_beatsNo
scale_nameNomajor
start_beatNo
unit_indexNo
call_rhythmNo0.5 0.5 0.5 1.0 0.5 0.5
track_indexNo
call_patternNo0 2 4 7 4 2
response_typeNoecho
response_intervalNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

No annotations exist, so the description carries full burden. It transparently explains that the tool creates call on track_index and response on track_index+1, and details response type behaviors. It omits potential overwrite behavior or permissions, but provides adequate transparency for a creative tool.

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

Conciseness3/5

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

The description is relatively long but well-structured with bullet points for response types and parameter explanations. Some information could be condensed, but the musical context justifies the length for an agent.

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?

Given no output schema, the description lacks explanation of return values or output format. It covers key behavioral aspects and many parameters, but misses some parameter explanations and the return value, leaving some gaps for a tool with 12 parameters.

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?

Schema coverage is 0%, so the description must add value. It provides detailed explanations for call_pattern, call_rhythm, response_interval, response_type, gap_beats, and pairs, including enumeration of response types. It does not explain key_root, velocity, scale_name, start_beat, unit_index, or track_index, though some are self-explanatory.

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 call-and-response patterns, with a specific verb ('create') and resource ('call-and-response'). It distinguishes from sibling tools like create_arpeggio, create_bassline, etc., which create different musical structures.

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

Usage Guidelines3/5

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

The description explains call-and-response as a concept and lists response types, implying appropriate contexts. However, it lacks explicit when-to-use or when-not-to-use guidance compared to alternatives. With many sibling tools, more explicit differentiation would help.

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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