set_playback_range

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

No annotations are provided, and the description only says 'set the playback range' without disclosing side effects, such as whether it overwrites the existing range, validates bounds against the global range, or requires a cooked timeline. The 'subset' hint adds minimal context but doesn't describe behavior on failure or clamping.

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?

One short sentence that gets straight to the point, with no filler. It's concise and front-loaded.

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 setter with no annotations or output schema, the description covers basic purpose but misses crucial details like unit format, parameter validation, and interaction with the global range, making it insufficient for safe autonomous invocation.

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 has two numeric params (start, end) with no descriptions. The description doesn't explain units, ordering, or constraints, and only indirectly implies these define the subset boundaries. With 0% schema coverage, more compensation was needed.

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 action: 'Set the playback range', and clarifies it as a 'subset of the global range', which distinguishes it from sibling tools like set_frame_range that likely modify the global range.

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?

Gives an implied usage context by noting it's a subset of the global range, but no explicit alternatives or exclusions are mentioned, so agents must infer when to use this over other timeline tools.

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