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manage_asset_library

Search, browse, and import HDRI, texture, and 3D model assets from Poly Haven and Sketchfab directly into Blender. Manage asset libraries with operations for categories, search, and import.

Instructions

PORTMANTEAU: Poly Haven + Sketchfab asset discovery and import (fleet subprocess Blender).

Operations:

  • info: Capabilities and env vars (SKETCHFAB_API_TOKEN).

  • polyhaven_categories: List category counts for hdris | textures | models.

  • polyhaven_search: Search catalog (uses api.polyhaven.com/assets).

  • polyhaven_import: Download + import — HDRIs set as world env; textures/models via files API bundles.

  • sketchfab_search: Sketchfab v3 search (requires token).

  • sketchfab_import: Download + import glTF from Sketchfab (requires token + downloadable model).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
operationNoWhich operation to run.info
asset_typeNoFor Poly Haven: hdris, textures, models, or all (search).hdris
categoriesNoOptional comma-separated Poly Haven categories filter.
pageNoResults page for polyhaven_search.
asset_idNoPoly Haven asset slug (e.g. venice_sunset) or Sketchfab UID for import.
resolutionNo1k | 2k | 4k | 8k | 16k where applicable.4k
file_formatNoFor HDRIs: hdr | exr. For models: gltf | fbx | blend preference chain start.
model_preferNoPreferred model package: gltf, fbx, or blend.gltf
queryNoSketchfab search query.
sketchfab_uidNoModel UID for sketchfab_import.
sketchfab_tokenNoOptional; defaults to SKETCHFAB_API_TOKEN env.
search_limitNoMax Sketchfab results (1-100).
downloadable_onlyNoSketchfab search filter.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior4/5

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

With no annotations, the description carries full burden. It details operation-specific behavior: HDRIs set as world env, textures/models via files API bundles, Sketchfab requires token and downloadable model. This provides useful context beyond the bare minimum, though it lacks failure modes or rate limits.

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?

The description is relatively concise, starting with a clear purpose line and listing operations. However, the list could be better formatted (e.g., proper bullet points) and is somewhat dense in a single paragraph.

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

Completeness4/5

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

Given the complexity (13 params, no required ones) and presence of an output schema, the description covers the main operations and their effects. It omits error handling and examples, but is sufficient for an agent to infer usage.

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 description coverage is 100%, meeting the baseline. The description adds behavioral context for operations (e.g., polyhaven_import specifics) but does not add meaning beyond the schema's parameter descriptions, which are already clear.

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?

The description opens with 'PORTMANTEAU: Poly Haven + Sketchfab asset discovery and import (fleet subprocess Blender)', which clearly states the tool's purpose and scope. It lists all operations, differentiating from sibling tools that focus on internal Blender tasks (e.g., blender_materials, blender_animation).

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

Usage Guidelines3/5

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

The description implicitly suggests usage for external asset discovery and import, but it does not explicitly state when to use this tool versus alternatives (e.g., blender_import for local files). No direct comparison or exclusions are provided.

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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