live12_device_list

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

With no annotations, the description carries the full behavioral burden. 'Queries' signals a read-only operation, but it says nothing about return shape, device ordering, behavior with an empty chain, or what happens on an invalid track index.

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?

A single, front-loaded sentence with no wasted words. Efficient, though it packs the resource wording densely enough that the scope ('Track.devices') is only clarified by the parenthetical.

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?

For a simple read-only list tool with a single fully documented parameter, the description is adequate but incomplete: with no output schema, the description should convey what is returned per device (names, indices, types) and what an empty or invalid track yields.

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?

Only one parameter with 100% schema description coverage ('Zero-based track index'), so baseline is 3. The description adds the context that the index refers to a track whose device chain is being listed, but no further semantics such as range limits or return-track relationship.

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?

States a specific verb+resource: 'Queries all devices in the device chain of an Ableton Live 12 track' with the Live API reference (Track.devices). An agent can tell it enumerates devices rather than manipulating them, but it doesn't explicitly contrast with the sibling live12_device_get_parameters, which an agent would need to pick between.

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?

Usage is only implied: the enumeration purpose suggests 'use before reading or setting device parameters', but neither the ordering with live12_device_get_parameters nor any exclusions are stated. No prerequisites (e.g., a track must exist) are mentioned.

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