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LofiFren

ableton-mcp-lofifren

by LofiFren

set_clip_loop

Define a clip's loop start and end points in beats, and enable or disable looping. Requires track and clip indices for precise targeting.

Instructions

Set a clip's loop region (in beats) and whether the clip loops.

Parameters:

  • track_index, clip_index: which clip

  • loop_start: loop start in beats

  • loop_end: loop end in beats (must be > loop_start)

  • loop_on: enable looping

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
track_indexYes
clip_indexYes
loop_startYes
loop_endYes
loop_onNo
Behavior3/5

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

The description indicates the tool modifies clip state (destructive) and notes that loop_end must be > loop_start, but lacks details on prerequisites, side effects, or error conditions. Without annotations, the description carries the full burden but provides only partial transparency.

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 concise: a single sentence stating purpose followed by a clear bullet list of parameters. Every element is meaningful, and the key constraint is highlighted.

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 5 parameters, no annotations, and no output schema, the description explains the parameters and one constraint but omits return values, error conditions, and prerequisites. It covers the basics but lacks completeness for full agent understanding.

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?

With 0% schema description coverage, the description compensates by explaining each parameter: loop_start/loop_end as beat positions, loop_on as enable toggle, and the constraint that loop_end > loop_start. This adds significant value beyond the schema's type-only info.

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 sets a clip's loop region and whether it loops, with specific verb and resource, distinguishing it from siblings like set_clip_length. It is precise and unambiguous.

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?

No guidance on when to use this tool versus alternatives, nor any explicit when-not-to-use. The description only explains parameters without contextual usage advice.

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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