capcut_add_dynamic_captions

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states that subtitles are added, but does not mention whether this overwrites existing captions, creates a new track, requires a selected track, or has any side effects on the draft timeline.

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 wasted words. It front-loads the core action and includes only high-signal stylistic details that help an agent understand the intended visual output.

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 8 parameters, no annotations, and no output schema, a one-sentence description leaves too much unspecified. It lacks guidance on track selection, timing semantics, interaction with existing captions, and when to prefer this tool over capcut_add_subtitles_batch.

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 high at 88%, so the schema already documents most parameters. The description adds stylistic context like pop colors and heavy outline, which loosely maps to highlightColor and strokeColor, but it does not meaningfully explain parameter behavior beyond what the schema provides.

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 uses a specific verb and resource: 'Add modern dynamic word-highlight subtitles'. The 'Alex Hormozi style' and 'pop colors and heavy outline' details make this visually distinct from generic text or subtitle tools. It clearly differentiates itself from siblings like capcut_add_text and capcut_add_subtitles_batch through the word-highlight behavior.

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?

There is no guidance on when to use this tool versus alternatives such as capcut_add_subtitles_batch or capcut_add_text. The description does not state prerequisites, exclusions, or scenarios where another tool would be more appropriate.

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