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generate_creative_video

Generate cinematic video for b-roll and visual storytelling without a presenter. Describe subject, action, setting, and camera movement to create custom scenes.

Instructions

Generate cinematic video using Google Veo. Best for b-roll, visual storytelling, and scenes without a presenter.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
seedNoSeed for reproducible generation (0-4294967295).
modelNoVeo model version.veo-3.1-generate-preview
promptYesDetailed description of the video. Include subject, action, setting, camera movement, lighting, and style.
durationNoVideo duration in seconds: 4, 6, or 8.
aspect_ratioNoVideo aspect ratio: '16:9', '9:16', '1:1'.16:9
sample_countNoNumber of video variants to generate (1-4).
negative_promptNoElements to avoid in generation (e.g., 'blurry, low quality, text overlays').
Behavior2/5

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

No annotations provided; description mentions Google Veo but fails to disclose behavioral traits such as generation latency, cost, content safety, or that output is a video (no audio). Unclear about any limitations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Extremely concise: two sentences that clearly state purpose and best use cases. No wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema or annotations, and description is too brief. Lacks information about output format, generation time, or any constraints, making it incomplete for a complex generative tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% with detailed parameter descriptions. Description adds minor context for prompt (e.g., 'include subject, action, setting, camera movement, lighting, and style') but does not significantly enhance meaning beyond schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Clearly states it generates cinematic video using Google Veo, and specifies use cases (b-roll, visual storytelling, scenes without presenter). Distinguishes from siblings like create_avatar_video or generate_video_from_image.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides best-use scenarios but does not explicitly mention when not to use or list alternatives like generate_video or generate_video_from_image. Suggests contexts but lacks explicit guidance.

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

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