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mcp_opendaw_freeze_audiounit

Reduce CPU usage by pre-rendering an audio unit's output offline and caching it for playback.

Instructions

Freeze an audio unit — pre-render its output offline to save CPU.

Uses audioUnitFreeze.freeze() which renders the AU's complete output via OfflineEngineRenderer and caches it. While frozen, the AU plays from cache instead of processing instruments/effects in real-time.

Cannot freeze AUs with sidechain dependents or the Output unit.

unit_index: AU index to freeze.

Returns success or error (e.g. sidechain dependents block freeze).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
unit_indexYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

With no annotations, the description carries full burden. It describes the offline rendering, caching, playback from cache, and the specific function used. It also lists constraints and return type. It does not mention reversibility or side effects, but overall is informative.

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 well-structured, starting with a summary, then technical detail, constraints, parameter, and return. It is concise but could trim some technical jargon. Each sentence serves a purpose.

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 simple parameter and existence of an output schema, the description covers the tool's behavior, constraints, parameter, and return. It lacks error handling specifics but is generally complete.

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 coverage is 0%, so the description must compensate. It explains 'unit_index: AU index to freeze.' This adds basic meaning but lacks specifics like range or how to obtain the index. Adequate for a single parameter.

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 clearly states the purpose: 'Freeze an audio unit — pre-render its output offline to save CPU.' It uses a specific verb and resource, and explains the mechanism. The purpose is distinct from sibling tools like unfreeze_audiounit and get_unit_freeze_status.

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 gives constraints like 'Cannot freeze AUs with sidechain dependents or the Output unit.' However, it does not explicitly state when to use this tool versus alternatives, nor does it provide comprehensive usage context beyond constraints.

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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