mcp_opendaw_create_track_region

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

No annotations are provided, so the description carries full burden. It discloses the error condition for audio tracks, the auto-detection of track type, default naming and hue behavior, and the return payload (region UUID, type, position). This goes well beyond a simple 'creates a region' statement.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is well-organized with an opening summary, bullet points for track-type behavior, a parameter list, and a return-value note. Every sentence serves a purpose, with no redundancy or unnecessary filler.

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

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

Given the tool's complexity (6 parameters, no annotations, output schema present), the description covers the core function, auto-detection behavior, error condition, parameter semantics, and return values. It is sufficient for an agent to invoke the tool correctly without additional context.

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

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

Schema description coverage is 0%, but the description fully compensates by explaining all six parameters: unit_index (-1 = search all AUs), track_index, start_beat, duration_beats, name (empty = auto), and hue (0-360, -1 = auto). This gives the agent everything needed to fill the parameters correctly.

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

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

The description clearly states the tool creates a region on any track (note or value) using a generic API, and explicitly distinguishes it from audio-track region creation by directing the user to place_audio_region instead. The verb 'Create' plus resource 'region' and scope 'track' are unambiguous.

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

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

It provides explicit usage context: automatically detects track type, supports note and value tracks, and for audio tracks it returns an error and directs to the alternative tool (place_audio_region). This is a clear when-to-use and when-not-to-use guideline, unmatched by siblings.

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