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jterrats
by jterrats

ableton_select_vst_for_midi

Select and load a VST instrument for a specific MIDI role on a selected track based on a search query and rationale.

Instructions

Load the LLM-chosen instrument/plugin for a MIDI role after inventory inspection.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
roleYesMusical role such as piano, bass, pad, lead, drums, or strings.
queryYesChosen VST/device/preset search string.
rationaleNoShort reason for the selection.
trackIndexYes
Behavior2/5

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

No annotations provided, so description must fully disclose behavior. It only states it loads an instrument, but omits critical details like whether it replaces existing plugins, destructive nature, required permissions, or side effects on the track.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence, front-loaded with key information. No wasted words, though could be more informative without losing conciseness.

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?

Tool lacks output schema and has 4 parameters with 3 required. Description fails to explain return values, error conditions, or post-load state, making it incomplete given the tool's complexity.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is high (75%), so baseline is 3. Description does not add any extra meaning beyond what the schema provides for 'role', 'query', or other parameters.

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?

Description clearly states verb ('Load') and resource ('instrument/plugin for a MIDI role'), with context 'after inventory inspection' that hints at its specific use case. However, it does not explicitly differentiate from sibling tools like 'ableton_load_device' or 'ableton_match_preset_intent'.

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?

Provides a minor usage hint ('after inventory inspection') implying a prerequisite, but lacks explicit guidance on when to use this tool versus alternatives, nor does it state when not to use it.

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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