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Ableton MCP Extended

Ableton MCP Extended

by RichieMiller-HU
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

load_sample_to_drum_pad

Load a browser sample onto a specific drum pad within an existing Drum Rack to build a custom kit pad-by-pad.

Instructions

Load a browser sample (by its URI) onto a specific pad of a Drum Rack that is already on the track. This lets you build a custom drum kit pad-by-pad.

Prerequisite: a Drum Rack must already be loaded on the track (use load_instrument_or_effect with the Drum Rack URI 'query:Drums#Drum%20Rack', or any drum kit). Get the sample's URI from get_browser_items_at_path.

Parameters:

  • track_index: The index of the track holding the Drum Rack

  • pad_note: MIDI note number of the target pad (e.g. 36=C1, 38=D1, 42=F#1)

  • item_uri: Browser URI of the sample to load onto that pad

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "track_index": "<track_index>",
      "pad_note": "<pad_note>",
      "item_uri": "<item_uri>"
    },
    "name": "load_sample_to_drum_pad"
  }
}

Input Schema

NameRequiredDescriptionDefault
item_uriYes
pad_noteYes
track_indexYes

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A4.3/5.0
Behavior3/5

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

No annotations were provided, so the description carries the full burden. It discloses the prerequisite (Drum Rack must already be loaded) and the parameter meanings, but does not specify whether loading a sample onto an occupied pad replaces it, what happens on failure, or any side effects. Adequate but not exhaustive.

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: two sentences for the action and prerequisite, followed by a clear bulleted parameter list. No redundant information; every sentence adds value.

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

Completeness4/5

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

Given the tool's complexity (3 parameters, prerequisite, output schema exists), the description covers the core functionality and parameter semantics well. It does not describe the return value, but the output schema likely covers that. Minor gaps: no mention of error handling or behavior on duplicate pads.

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 description coverage is 0%, but the description fully explains each parameter: track_index (track holding Drum Rack), pad_note (MIDI note number with examples), item_uri (browser URI from get_browser_items_at_path). This adds crucial meaning beyond the bare schema.

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 action: load a browser sample onto a specific pad of a Drum Rack. It distinguishes from sibling tools like load_instrument_or_effect (loads an entire device) and load_drum_kit (loads a full kit), making the specific use case unambiguous.

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 explicitly says when to use this tool (to build a custom drum kit pad-by-pad) and provides prerequisite steps (using load_instrument_or_effect). It lacks an explicit statement of when not to use it or mention of alternatives like load_drum_kit, but the context is clear.

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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