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Rename track

reaper_set_track_name

Rename a REAPER track by its index: provide the track number and new name to update the label, keeping your session organized.

Instructions

Set the name of the track at the given index.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
indexYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.1/5.0
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It indicates a mutation ('Set') but does not disclose side effects, reversibility, error handling for invalid indexes, or whether the operation requires any preconditions. For a write operation with zero annotation coverage, this is a significant gap.

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 a single, front-loaded sentence with zero filler. It conveys the essential action immediately and avoids unnecessary detail. This is exemplary 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?

The tool is simple with only two parameters and no output schema, but it lacks essential context: no explanation of expected behavior on out-of-bounds indexes, empty names, or whether the operation is undoable. Given no annotations and no schema descriptions, the description alone is insufficient for an agent to call this tool robustly without additional assumptions.

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

Parameters1/5

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 by explaining the parameters. It only mentions 'track at the given index', implying an index parameter but never describing the 'name' parameter's format, constraints, or meaning. The schema provides only basic types with no descriptions, and the description adds no meaningful elaboration, leaving both parameters under-specified.

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

Purpose5/5

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

The description states a specific verb ('Set'), the resource ('the name of the track'), and the scope ('at the given index'). It clearly distinguishes itself from sibling tools like reaper_set_track_mute or reaper_set_track_volume, which target different properties. An agent can immediately understand what this tool does without opening the schema.

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?

The description implies usage whenever a track's name needs to be changed, but it provides no explicit when-to-use guidance or alternatives. It doesn't mention that other track-setting tools exist or when one might prefer them. However, the purpose is self-evident enough that an agent can infer the context, so it's adequate but not explicit.

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