davinci_create_vertical_timeline

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

There are no annotations, so the description carries the full burden of behavioral disclosure. It reveals that the tool mutates state by creating a timeline and arranging clips, but it does not disclose prerequisites, side effects on existing timelines, error behavior, or whether media must already be imported. For a mutation tool this is a significant transparency gap.

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 focused sentence with no filler. It front-loads the core action and resolution, and every word contributes meaning.

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?

With 4 parameters, no annotations, and 0% schema coverage, the description is too thin for an agent to call the tool reliably. It omits parameter semantics, prerequisites, and any workflow context. The presence of an output schema helps with return values but does not compensate for the missing operational guidance.

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 for the lack of parameter documentation. It only hints at clip_names through 'designated clips' and never explains audio_path or clip_duration_frames. An agent cannot infer what audio_path expects or what clip_duration_frames controls from this text.

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 a specific verb ('Creates'), a specific resource ('new 1080x1920 vertical timeline in DaVinci Resolve'), and an additional behavior ('arranges designated clips'). It also distinguishes itself from siblings like davinci_create_vertical_project, which creates a project rather than a timeline.

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 implies the tool is used when a new vertical timeline should be created and clips placed on it, but it gives no explicit when-to-use guidance, prerequisites, or exclusions. Since davinci_create_vertical_project exists as a close sibling, explicit routing between project creation and timeline creation would be valuable.

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