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Ableton MCP Extended

by zabolotniydj

set_arrangement_clip_property

Modify arrangement clip properties by specifying track and clip. Adjust name, mute, color, looping, gain, pitch, and warp settings to refine clip behavior directly in Ableton Live.

Instructions

Set properties on an arrangement clip.

Parameters:

  • track_index: Track number (1-based).

  • clip_index: Clip position (1-based).

  • clip_name: Clip name (alternative to clip_index).

  • name: New clip name.

  • muted: Mute state.

  • color: Color (0x00RRGGBB).

  • looping: Loop on/off.

  • loop_start: Loop start in beats.

  • loop_end: Loop end in beats.

  • gain: Audio gain (0.0-1.0).

  • pitch_coarse: Semitone pitch shift (-48 to 48).

  • pitch_fine: Fine pitch shift (-50 to 49 cents).

  • warping: Warp on/off.

  • warp_mode: Warp mode (0-6).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
gainNo
nameNo
colorNo
mutedNo
loopingNo
warpingNo
loop_endNo
clip_nameNo
warp_modeNo
clip_indexNo
loop_startNo
pitch_fineNo
track_indexYes
pitch_coarseNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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 lists parameter meanings but does not disclose side effects, whether it modifies only specified properties, or how it handles invalid track/clip indices. This is a mutating tool with almost no behavioral context beyond the name.

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 a single introductory sentence followed by a compact bullet list of parameters. Each parameter entry is necessary and informative without redundancy. The main purpose is front-loaded, making it easy to scan.

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 tool has 14 parameters and no annotations, so the description needs to provide operational context. It covers parameter semantics well but omits how properties interact, whether clip_name takes precedence, error behavior, and return values. The description is a solid parameter reference but not a complete usage guide.

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 must compensate. It does so comprehensively by explaining all 14 parameters, including data types, units (1-based indices, 0x00RRGGBB color), ranges (gain 0.0-1.0, pitch -48 to 48), and the relationship between clip_name and clip_index. This fully addresses the schema's lack of 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 uses the specific verb 'Set' with the resource 'arrangement clip', and the parameter list clarifies the exact properties involved. The 'arrangement' qualifier distinguishes it from the sibling set_clip_property, which likely targets session clips.

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

Usage Guidelines2/5

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

There is no guidance on when to use this tool compared to alternatives like set_clip_property or get_clip_properties. The description does not mention dependencies, required conditions, or explicit alternatives, leaving the agent to infer usage solely from the tool name.

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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