set_loop_region

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

No annotations are provided, so the description carries full responsibility for behavioral disclosure. It only explains parameter meanings and does not mention side effects, scope (e.g., arrangement vs. session), reversibility, or any behavioral constraints. This is insufficient for a tool with no annotation support.

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 concise with a clear structure: a summary sentence followed by an indented argument list. It avoids verbosity and every line serves a purpose. However, it is quite sparse and could benefit from a short scope clarification, but structure itself is effective.

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 3 optional parameters, no annotations, and an output schema, the description still lacks essential context. It does not specify whether the loop region applies to the arrangement, session, or transport, nor does it mention any side effects or prerequisites. The presence of an output schema reduces the need to explain return values, but the description remains incomplete for a user to use it confidently.

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%, so the description must compensate. It does provide useful semantics: loop_on (enable/disable), loop_start (position in beats), loop_length (length in beats). This adds meaning beyond the schema, but it lacks details about null handling, defaults, and relationships between parameters (e.g., ignored when loop_on is false). Partially compensates for the schema gap.

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 'Set the loop region and on/off state' – a specific verb (set) with a clear resource (loop region) and additional detail (on/off state). However, it does not differentiate between this and the sibling tool 'set_clip_loop', as the term 'loop region' could be confused with a clip loop. Purpose is clear but lacks sibling differentiation.

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 provides no guidance on when to use this tool versus alternatives like set_clip_loop or other looping tools. It only lists arguments with no context about use cases, prerequisites, or exclusions. There is no mention of when this should be preferred over other related tools.

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