Skip to main content
Glama
untitledxdamage

Ableton MCP for Live Intro

set_device_parameters

Modify multiple parameters across track, return, master, or rack devices at once, including switches like Device On, by providing indices and raw numeric or option-name values.

Instructions

Set several parameters at once: {"Frequency": 0.4, "Resonance": 0.3}. Keys are parameter names (or indexes as strings); values are raw numbers within min/max, or an option name for switch parameters. {"Device On": 0} bypasses it. Raw values are not always linear units: check the returned 'display' and adjust. Racks: pass chain + chain_device to reach a device inside a rack (see get_rack).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
kindNotrack
chainNo
valuesYes
track_indexYes
chain_deviceNo
device_indexYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.3.0

TDQS

A3.6/5.0
Behavior4/5

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

With no annotations, the description carries the full burden and does substantial work: it documents that multiple values are applied at once, that raw values are non-linear and should be verified against the returned 'display', how switch parameters and bypass are expressed, and how to reach devices inside racks. It omits permission/auth requirements, error behavior, and reversibility.

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?

Dense, front-loaded prose with inline examples that each earn their place; no filler sentences. The rack note and display-verification caveat are placed at the end appropriately.

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 6-parameter mutation tool with no annotations and no output schema, the description covers the hard part (values semantics, switches, racks, non-linear units) but leaves the addressing parameters (kind, track_index, device_index) undocumented, which an agent needs to call it correctly.

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 description coverage is 0%, so the description must compensate. It ably explains the nested 'values' object, key forms (names or string indexes), and the chain/chain_device rack parameters, but leaves 'kind' (track/return/master), 'track_index', and 'device_index' entirely unexplained in both schema and description.

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 a specific verb+resource ('Set several parameters at once') and clarifies the batch nature, which naturally distinguishes it from the single-parameter sibling set_parameter_real and the read-side get_device_parameters. It does not name those siblings explicitly, so it falls just short of the top mark.

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 implied rather than stated: batching, raw-number-vs-option-name value forms, bypass via {"Device On": 0}, and rack pathing via chain + chain_device. There is no explicit when-to-use-this-instead-of guidance and no exclusions or prerequisites.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.