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mcp_opendaw_list_value_regions

Read-only

List automation regions (ValueRegionBox) on value tracks in the audio workstation. Specify unit and track indices to retrieve region data including position, duration, loop settings, mute, and label.

Instructions

List automation regions (ValueRegionBox) on value/automation tracks.

Finds all Value-type tracks (automation) and lists their regions with position, duration, loop settings, mute, and label.

unit_index: Audio unit index (-1 = search all AUs). track_index: Specific value track (-1 = all value tracks on the unit).

Returns list of automation regions.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
unit_indexYes
track_indexYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

The annotations already set readOnlyHint=true, so the description reinforces it by describing a read-only list operation. It adds context that the tool searches all Value-type tracks and returns region details. No contradictions; behavior is transparent and consistent with annotations.

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 fairly concise with two short paragraphs: first explains the tool's action and output, second details parameters. Every sentence adds value, but the explanation of parameters could be integrated into a single structured format. No wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the output schema exists (as indicated by context), the description does not need to detail return values. Parameters are well-documented, and the tool's scope is clear. Complete enough for an agent to use correctly, though adding a note about the output schema structure would enhance completeness.

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

Parameters4/5

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

Schema description coverage is 0%, so the description carries the full burden. Both parameters are explained with their meaning and sentinel values (-1 for all). This adds significant meaning beyond the raw schema, though could be slightly more detailed (e.g., data types implied but not stated).

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?

The description clearly states it lists automation regions on value/automation tracks, specifying the returned fields (position, duration, loop settings, mute, label). It differentiates itself by focusing on 'ValueRegionBox' and 'value/automation tracks', though it could be more explicit about how it differs from similar list tools like list_automation_events.

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 explicit guidance on when to use this tool versus alternatives. The description implies usage when you need to list automation regions, but given many sibling list tools, the agent needs clearer decision criteria (e.g., 'Use this instead of list_automation_events when you need region-level data'). Missing when-not-to-use or alternative tool references.

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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