live12_transport_set_loop

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

With no annotations, the description carries the full burden and does not disclose whether the change takes effect immediately during playback, whether it is destructive to existing loop points, or what it returns. Only the length>0 validation constraint is stated, which is a small slice of the behavioral surface for a mutation 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?

Two short clauses with the core purpose front-loaded and a constraint second; nothing is padded. It could be marginally clearer by stating the unit context for start/length rather than relying on the schema, but it is efficient.

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 3-required-parameter setter with no output schema, the description covers what is configured and one validation rule, which is close to sufficient. However, with no annotations it leaves the agent unsure about runtime effects on playback and about whether sibling tools (live12_lom_set) are preferred over this one.

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 100%, so the baseline is 3. The description merely restates the length-positivity rule that the schema already enforces via exclusiveMinimum 0, and adds no format, unit, or interaction semantics beyond what the schema provides.

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 and resource ('Configures arrangement loop') in a named host (Ableton Live 12) and even maps it to the underlying LOM properties (Song.loop, Song.loop_start, Song.loop_length). It is distinguishable from neighbors like live12_transport_set_punch or live12_transport_set_metronome by the resource it targets, though it never explicitly contrasts with them.

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 versus siblings (e.g., live12_lom_set could presumably set the same properties) and no prerequisites or preconditions mentioned. The reader must infer all usage context.

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