Skip to main content
Glama

get_track_envelope

Retrieve a track envelope by name and track index to inspect volume, pan, mute, or other automation data in REAPER.

Instructions

Get a track envelope by name.

Args: envelope_name: Envelope name (e.g., "Volume", "Pan", "Mute").

Returns: Object with envelope info.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
track_indexYes
envelope_nameYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.7.3

TDQS

C2.7/5.0
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. It states only that an "Object with envelope info" is returned, without describing what that object contains, what happens if the envelope name is invalid, or whether the envelope must be armed/active first.

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?

Short and front-loaded with the core purpose in the first line. The Args/Returns scaffolding is somewhat boilerplate but not wasteful, and no sentence is redundant.

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?

With no output schema and no annotations, the description should explain the returned envelope structure, but it only says "Object with envelope info." Combined with the undocumented track_index parameter, an agent lacks enough to call this reliably beyond the simplest case.

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

Parameters2/5

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 documents envelope_name with useful examples ("Volume", "Pan", "Mute") but completely omits track_index, one of the two required parameters, leaving half the input undocumented 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 and resource ("Get a track envelope") with a name-based lookup. However, it does not distinguish this from close siblings like get_fx_envelope or get_envelope_points, leaving the agent to infer which retrieval tool applies.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this versus the many envelope-related siblings (get_fx_envelope, get_envelope_points, add_envelope_point). No prerequisites or exclusions are stated.

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

Deploy Server

Other Tools