set_playback_range

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

With no annotations, the description discloses key behavioral traits: it is a scene write operation and is undoable. It also states validation matches set_frame_range, giving the agent a concrete behavioral contract, though it omits error handling and exact side 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?

Extremely concise and front-loaded, but the cryptic 'PR 19' abbreviation and cross-reference to set_frame_range require prior knowledge. Still, no wasted sentences.

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?

The tool is simple, but with no annotations, no output schema, and 0% schema coverage, the description leaves critical invocation details unspecified—especially parameter semantics and differentiation from set_frame_range. The undo and validation notes provide some context but are insufficient for confident autonomous use.

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 coverage is 0%, and the description does not explain the meaning or expected format of ctx, start, or end. It only implies a range via the tool name, leaving parameter usage entirely undocumented.

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?

Description states a specific action—setting the playback range—and references the underlying Houdini API (hou.playbar.setPlaybackRange). It is clear, but it does not explicitly distinguish itself from the closely related sibling tool set_frame_range, merely noting shared validation.

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 choose set_playback_range over set_frame_range or other playbar tools. The only reference to set_frame_range is for shared validation, not usage context or alternatives.

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