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download_sketchfab_model

Download and import 3D models from Sketchfab directly into Blender using the model's unique identifier (UID).

Instructions

Download and import a Sketchfab model by its UID.

Parameters:
- uid: The unique identifier of the Sketchfab model

Returns a message indicating success or failure.
The model must be downloadable and you must have proper access rights.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
uidYes

Implementation Reference

  • The primary handler for the download_sketchfab_model MCP tool. It uses the BlenderConnection to send a 'download_sketchfab_model' command to the Blender addon with the provided UID, handles the response, and returns success/failure message with imported object names.
    @mcp.tool()
    def download_sketchfab_model(
        ctx: Context,
        uid: str
    ) -> str:
        """
        Download and import a Sketchfab model by its UID.
        
        Parameters:
        - uid: The unique identifier of the Sketchfab model
        
        Returns a message indicating success or failure.
        The model must be downloadable and you must have proper access rights.
        """
        try:
            
            blender = get_blender_connection()
            logger.info(f"Attempting to download Sketchfab model with UID: {uid}")
            
            result = blender.send_command("download_sketchfab_model", {
                "uid": uid
            })
            
            if result is None:
                logger.error("Received None result from Sketchfab download")
                return "Error: Received no response from Sketchfab download request"
                
            if "error" in result:
                logger.error(f"Error from Sketchfab download: {result['error']}")
                return f"Error: {result['error']}"
            
            if result.get("success"):
                imported_objects = result.get("imported_objects", [])
                object_names = ", ".join(imported_objects) if imported_objects else "none"
                return f"Successfully imported model. Created objects: {object_names}"
            else:
                return f"Failed to download model: {result.get('message', 'Unknown error')}"
        except Exception as e:
            logger.error(f"Error downloading Sketchfab model: {str(e)}")
            import traceback
            logger.error(traceback.format_exc())
            return f"Error downloading Sketchfab model: {str(e)}"
Behavior3/5

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

With no annotations provided, the description carries full burden. It discloses that the model must be downloadable and requires proper access rights, which are useful behavioral constraints. However, it lacks details on what 'import' entails (e.g., file format, destination), potential side effects, or error handling, leaving gaps for a mutation tool.

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 appropriately sized with three sentences: purpose, parameters, and behavioral notes. It's front-loaded with the core action and wastes no words, though the parameter explanation could be slightly more integrated rather than bulleted for optimal flow.

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 no annotations, no output schema, and a single parameter, the description is minimally adequate. It covers the basic purpose and constraints but lacks details on return values (only mentions 'message'), import specifics, or error cases, which are important for a download/import operation.

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

Parameters4/5

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

Schema description coverage is 0%, so the description must compensate. It adds meaning by explaining that 'uid' is 'The unique identifier of the Sketchfab model', which clarifies the parameter's purpose beyond the schema's generic string type. Since there's only one parameter, this is sufficient for a high score, though not exhaustive.

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 ('Download and import') and resource ('a Sketchfab model by its UID'), distinguishing it from siblings like 'search_sketchfab_models' or 'get_sketchfab_status'. However, it doesn't explicitly differentiate from 'import_generated_asset' or specify the import destination, which prevents a perfect score.

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 implies usage when you have a specific model UID and need to download/import it, but provides no explicit guidance on when to use this versus alternatives like 'import_generated_asset' or prerequisites beyond access rights. It mentions access requirements but lacks context on alternatives or exclusions.

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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