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F-Fischer
by F-Fischer

load_instrument_or_effect

Load an instrument or effect onto a specific Ableton Live track using its URI. Specify the track index and device URI to apply the desired sound.

Instructions

Load an instrument or effect onto a track using its URI.

Parameters:

  • track_index: The index of the track to load the instrument on

  • uri: The URI of the instrument or effect to load (e.g., 'query:Synths#Instrument%20Rack:Bass:FileId_5116')

  • user_prompt: The original user prompt that led to this tool call (for telemetry)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
uriYes
track_indexYes
user_promptNo
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 of behavioral disclosure. It only states the action and URI requirement; it does not mention side effects, whether existing devices are replaced, error conditions, or what response is returned.

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: one clear purpose sentence followed by a tight parameter list. There is no filler, repetition, or unnecessary information.

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

Completeness2/5

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

For a tool that likely mutates a project and has no annotations or output schema, the description omits behavioral details, return values, and caveats about URI validity or track requirements. It provides enough to attempt a call but not enough to fully anticipate outcomes.

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%, but the description compensates by defining all three parameters with short explanations, including a URI example and the telemetry purpose of user_prompt. This adds meaning beyond the bare schema, though not deeply.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a clear action ('Load'), specific resource ('instrument or effect'), target ('onto a track'), and method ('using its URI'). It is not as explicit as it could be about distinguishing from sibling tool load_drum_kit, but the scope is reasonably clear.

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?

Usage is only implied: you need a URI to load an instrument or effect. There is no explicit guidance on when to choose this tool over load_drum_kit, search_browser_items, or other sibling tools, and no stated preconditions or exclusions.

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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