set_playback_range

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

Beyond the idempotentHint annotation, the description adds no behavioral detail such as whether the change affects rendering, whether values are in frames, or whether the existing preview is replaced. It simply restates the action rather than explaining effects.

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 short sentence with no filler, and the core action is front-loaded. It earns its place, though the brevity leaves room for useful details without becoming verbose.

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 two-parameter tool this is close to minimally viable, but the complete lack of parameter semantics and usage context makes it insufficient for a confident call. The output schema may document returns, but the description still does not explain the meaning of start/end or how this differs from set_frame_range.

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 no descriptions and schema coverage is 0%. The description only implies that 'start' and 'end' correspond to the range endpoints; it does not explain units, ordering, boundaries, or how these map to the preview/playback concept.

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 gives a clear verb ('Set') and a specific resource ('preview/playback range'), so an agent can tell this is about configuring the playback region. It does not explicitly contrast it with the sibling set_frame_range, but the 'preview/playback' wording provides enough distinction for a basic selection.

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 over alternatives such as set_frame_range or playback_control. There is no mention of contexts, prerequisites, or exclusions, leaving the agent to infer usage from the name alone.

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