Create an empty MIDI item on a specific track by setting its start time and length. Returns the global index of the newly created item for further editing.
Create an empty MIDI item on a track. Returns the item's global index.
Args: track_index: 0-based track index. position: Item start time in seconds (>= 0). length: Item length in seconds (> 0).
| Name | Required | Description | Default |
|---|---|---|---|
| length | No | ||
| position | No | ||
| track_index | Yes |
Changes observed during successful MCP inspections. Dates show when Glama detected each change.
v0.3.0Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided. The description does not disclose side effects like undo handling, selection changes, or error behavior (e.g., invalid track_index). More context is needed for a creation tool.
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?
Extremely concise: one-line summary followed by bullet points for parameters. No redundant information, front-loaded purpose.
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?
The description specifies the return value (global index) but lacks error handling details or reminders for related operations (e.g., item_delete). Adequate for a simple tool but could be more complete.
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 has 0% description coverage, but the description adds meaningful constraints: track_index is 0-based, position >=0, length >0, and units are seconds. This adds value beyond the schema defaults and types.
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 'Create an empty MIDI item on a track' with a specific verb and resource. It distinguishes from siblings like item_insert_media and item_get_all.
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?
No guidance on when to use this tool versus alternatives. Siblings like item_insert_media offer related functionality, but no comparison or exclusion criteria are provided.
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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