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create_asset

Downloads a file from a URL and persists it as a workspace asset, usable immediately in projects.

Instructions

Create an asset from URL

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYesRemote file URL to download and persist as a workspace asset. The file is downloaded asynchronously (S3 upload + thumbnail generation). The returned asset UUID is usable immediately — e.g. in ProjectItem data.assets[].
nameNoDisplay name for the asset. If omitted, auto-extracted from the URL filename.
asset_typeNoAsset type integer. Use 0 for images (default for AI-generated creatives). Values: 0=image, 2=video, 4=giphy, 6=font, 8=audio, 17=pdf.
Behavior2/5

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

The description says nothing about behavior (e.g., asynchronous download, side effects, return values). The schema provides some details, but the description itself lacks disclosure.

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

Conciseness3/5

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

The description is extremely concise (one sentence) but lacks necessary detail. It is not wasteful but is undersized.

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?

Given 3 parameters, no output schema, and no annotations, the description should provide more behavioral and usage context. It fails to do so.

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. The description adds no additional meaning about parameters, so baseline 3 applies.

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

Purpose4/5

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

The description clearly states the action (create) and resource (asset) and the method (from URL). It distinguishes from sibling tools like generate_image or create_board.

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

Usage Guidelines2/5

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

No guidance on when to use this tool versus alternatives. There is no mention of prerequisites, context, or when not to use it.

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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