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set_device_parameter

Set a device parameter in Ableton Live to a desired value using human-readable units. Presents current and proposed values for explicit user approval before executing the change.

Instructions

Sets a device parameter to a new value. Pass values in human-readable units (dB, ms, Hz, ratio, percent). NEVER call without explicit user approval. Present the planned change with current → proposed values first, wait for a clear 'yes', then execute. If the user modifies the plan, re-present and re-confirm before executing.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
unitYes
valueYes
track_nameYes
device_nameYes
parameter_nameYes
Behavior4/5

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

With no annotations, the description carries the full burden. It clearly discloses the critical approval workflow: present current → proposed, wait for a clear yes, and re-confirm if modified. This is significant behavioral context, though it omits side effects, return values, and error handling.

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?

The description is front-loaded with the core action and stays brief overall. The approval instructions are repeated across multiple sentences, creating minor redundancy, but the length is justified for a safety-critical mutation tool.

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?

The approval workflow is well specified, but the lack of an output schema means the description should clarify what happens after execution (e.g., success/failure, persistence). It also doesn't mention how to obtain current values, leaving the 'current → proposed' step underspecified.

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?

The description adds useful meaning by specifying that values are in human-readable units and listing them (dB, ms, Hz, ratio, percent), which applies to the value/unit pair. However, track_name, device_name, and parameter_name are left to inference, and with 0% schema coverage, more compensation would be expected.

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?

States clearly that it sets a device parameter to a new value, using a specific verb and resource. However, it does not explicitly distinguish from sibling tools like toggle_device_bypass, leaving some scope ambiguity.

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 strong procedural guideline requiring explicit user approval, but gives no context on when to use this tool versus alternatives. The intended usage is implied by the tool's function rather than explicitly stated.

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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