set_loop

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

Annotations only include 'destructiveHint: false'. The description accurately states the tool's behavior (setting loop region and toggle) but does not disclose any side effects or additional behavioral context beyond the annotation. It does not contradict annotations.

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 a single sentence, concise and front-loaded. However, it could be slightly improved by structuring the information more explicitly without adding length.

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 presence of an output schema (not shown), the description need not explain return values. However, it lacks any mention of what happens when 'enabled' is false, or how the loop region interacts with other settings. The description is minimally 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?

The input schema has 0% description coverage, and the description only implies that 'start' and 'length' are in beats. No detailed meaning, range, or behavior for parameters is provided, leaving the agent with insufficient context for correct invocation.

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 verb 'set' and the resource 'arrangement loop region', and specifies two actions: setting the loop region in beats and enabling/disabling looping. This distinguishes it from sibling tools like 'set_clip_loop' which operate on clips.

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 is provided on when to use this tool versus alternatives such as 'set_clip_loop' or other arrangement controls. The description lacks explicit when-to-use or when-not-to-use information.

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