create_midi_item

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

No annotations are provided, and the description does not disclose side effects, permissions, or constraints (e.g., whether items can be overwritten, parameter limits). It only states creation and return value, lacking behavioral depth.

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 very concise (two sentences) and front-loaded with the core action. However, it may be overly sparse, sacrificing useful details for brevity.

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 lack of output schema, no annotations, and zero parameter descriptions in either schema or description, the tool is severely underdocumented. Missing details include error handling, return value format, and parameter constraints.

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?

The description adds no information about the parameters (track_index, start_position, length) beyond the input schema. With 0% schema description coverage, the description should compensate, but it fails to explain units, valid ranges, or how parameters affect behavior.

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 action ('Create an empty MIDI item on a track') and the resource (MIDI item). It also indicates the return value (item_id) and links to a sibling tool (add_midi_note), helping differentiate its role in the workflow.

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?

The description implies a usage chain (create item then add notes), but does not explicitly state when to use this tool versus alternatives, nor does it provide exclusions or prerequisites beyond the implicit workflow.

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