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seedance_generate_video

Create AI videos directly from text descriptions. Describe your scene, motion, style, and mood to generate high-quality video without reference images.

Instructions

Generate AI video from a text prompt using ByteDance Seedance.

This is the simplest way to create video - just describe what you want and
Seedance will generate a high-quality AI video.

Use this when:
- You want to create a video from a text description
- You don't have reference images
- You want quick text-to-video generation

For using reference images (first/last frame, reference), use
seedance_generate_video_from_image instead.

Returns:
    Task ID and generated video information including URLs and metadata.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
seedNoRandom seed for reproducible generation. Range: -1 to 4294967295. Use -1 for random. Default is -1.
modelNoModel version to use. Options: 'doubao-seedance-2-0-260128' (latest generation, highest quality, supports 4k and multimodal reference, default), 'doubao-seedance-2-0-fast-260128' (latest generation, faster, up to 720p), 'doubao-seedance-2-0-mini-260615' (latest generation, lightweight, cheapest within the 2.0 series, up to 720p), 'doubao-seedance-1-5-pro-251215' (1.5 flagship, supports audio), 'doubao-seedance-1-0-pro-250528' (1.0 standard), 'doubao-seedance-1-0-pro-fast-251015' (1.0 fast, cost-optimized), 'doubao-seedance-1-0-lite-t2v-250428' (lightweight text-to-video), 'doubao-seedance-1-0-lite-i2v-250428' (lightweight image-to-video).doubao-seedance-2-0-260128
ratioNoVideo aspect ratio. Options: '16:9' (landscape, default), '9:16' (portrait), '1:1' (square), '4:3', '3:4', '21:9' (ultrawide), 'adaptive'.16:9
framesNoFrame count for the generated video. Must satisfy 25+4n (e.g. 29, 33, 37, ..., 361). Mutually exclusive with 'duration'.
promptYesDescription of the video to generate. Max 1000 characters. Be descriptive about the scene, motion, style, and mood. You can also include inline parameters like '--rs 720p --rt 16:9 --dur 5'. Examples: 'A cat walking through a garden with butterflies', 'Cinematic aerial shot of mountains at sunset'
durationNoVideo duration in seconds. Range: 2-15 (Seedance 2.0 supports 4-15). Default is 5. Mutually exclusive with 'frames'.
watermarkNoIf true, add a watermark to the video. Default is false.
resolutionNoVideo resolution. Options: '480p', '720p' (default), '1080p', '4k'. '4k' is supported only by 'doubao-seedance-2-0-260128'; '2-0-fast' and '2-0-mini' max out at '720p'.720p
callback_urlNoWebhook callback URL for asynchronous notifications. When provided, the API returns immediately with a task_id and calls this URL when the video is generated.
camera_fixedNoIf true, keep the camera fixed during generation. Default is false.
service_tierNoService tier. 'default' for standard processing, 'flex' for 50%% cheaper but slower processing. Default is 'default'.default
generate_audioNoIf true, generate audio along with the video. Supported by 'doubao-seedance-1-5-pro-251215' and the 'doubao-seedance-2-0' series; other models ignore it. Approximately doubles the cost. Default is false.
return_last_frameNoIf true, also return the last frame of the generated video as an image URL. Useful for video extension workflows. Default is false.
execution_expires_afterNoTask timeout threshold in seconds. Default is 172800 (48 hours).

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

No annotations exist, so description must bear the burden. It mentions returns a task ID and video info, hinting at async behavior, but does not explicitly state it returns immediately or that the user must poll or use callback for completion. Lacks details on processing time, cost implications, or failure modes.

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

Conciseness4/5

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

Three paragraphs: core action, when-to-use bullets, returns line. No filler, front-loaded, and easy to scan. Could be slightly more compact, but efficient for the information conveyed.

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

Completeness3/5

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

Given 14 parameters and a sibling tool, the description covers purpose and differentiation well but omits important execution context like async behavior, polling instructions, and cost implications. Adequate but not fully comprehensive.

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%, so baseline is 3. The description does not add extra meaning beyond what the schema already provides for parameters; it only summarizes the return type.

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 the tool generates AI video from a text prompt, specifying ByteDance Seedance. Differentiates from sibling by noting it's the simplest path without reference images, and explicitly directs to seedance_generate_video_from_image for image-based generation.

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

Usage Guidelines5/5

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

Provides explicit 'when to use' scenarios (text-only, no images, quick generation) and explicitly names the alternative for image-based use, leaving no ambiguity about tool selection.

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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