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LofiFren

ableton-mcp-lofifren

by LofiFren

create_clip

Generate a new MIDI clip in a specified track and clip slot, with customizable length in beats.

Instructions

Create a new MIDI clip in the specified track and clip slot.

Parameters:

  • track_index: The index of the track to create the clip in

  • clip_index: The index of the clip slot to create the clip in

  • length: The length of the clip in beats (default: 4.0)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
track_indexYes
clip_indexYes
lengthNo
Behavior2/5

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

With no annotations, the description carries full burden but only states the basic creation action. It does not disclose potential side effects like overwriting existing clips, permission requirements, or error conditions.

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 with one introductory sentence followed by a clear parameter list. Every sentence adds value with no redundancy.

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?

For a simple tool with 3 parameters and no output schema, the description covers the basic creation action. However, it lacks usage guidelines and behavioral details, making it minimally viable but not fully complete for an agent's decision-making.

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?

Despite 0% schema description coverage, the description adds explanations for each parameter beyond the schema's titles and types. For example, it defines 'track_index' as 'the index of the track' and 'length' as 'the length in beats'. However, it could specify indexing convention (0-based) and behavior when clip slot is occupied.

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 verb 'create', the resource 'MIDI clip', and the specific location 'in the specified track and clip slot'. This distinguishes it from siblings like 'create_clip_with_notes' and 'add_clip_to_arrangement'.

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 is provided on when to use this tool versus alternatives. There is no mention of prerequisites, exclusions, or context for choosing this over similar tools like 'create_clip_with_notes'.

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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