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ujs204

BlenderMCP

by ujs204

get_sketchfab_status

Check if Sketchfab integration is enabled in Blender to verify availability of 3D model sharing features.

Instructions

Check if Sketchfab integration is enabled in Blender. Returns a message indicating whether Sketchfab features are available.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • The primary handler function for the 'get_sketchfab_status' tool. It uses the @mcp.tool() decorator for registration and implements the logic by sending a 'get_sketchfab_status' command to the Blender addon via socket connection, processing the response to return a status message indicating if Sketchfab integration is enabled.
    @mcp.tool()
    def get_sketchfab_status(ctx: Context) -> str:
        """
        Check if Sketchfab integration is enabled in Blender.
        Returns a message indicating whether Sketchfab features are available.
        """
        try:
            blender = get_blender_connection()
            result = blender.send_command("get_sketchfab_status")
            enabled = result.get("enabled", False)
            message = result.get("message", "")
            if enabled:
                message += "Sketchfab is good at Realistic models, and has a wider variety of models than PolyHaven."        
            return message
        except Exception as e:
            logger.error(f"Error checking Sketchfab status: {str(e)}")
            return f"Error checking Sketchfab status: {str(e)}"
  • Helper prompt in asset_creation_strategy that instructs the AI on when and how to use the get_sketchfab_status tool to check Sketchfab integration status before using related tools.
    Sketchfab is good at Realistic models, and has a wider variety of models than PolyHaven.
    Use get_sketchfab_status() to verify its status
    If Sketchfab is enabled:
    - For objects/models: First search using search_sketchfab_models() with your query
    - Then download specific models using download_sketchfab_model() with the UID
    - Note that only downloadable models can be accessed, and API key must be properly configured
    - Sketchfab has a wider variety of models than PolyHaven, especially for specific subjects
  • The @mcp.tool() decorator registers the get_sketchfab_status function as an MCP tool.
    @mcp.tool()
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions the return value ('Returns a message indicating whether Sketchfab features are available'), which adds some context, but fails to detail critical aspects like error handling, whether this is a read-only operation, or any performance implications. For a tool with zero annotation coverage, this is insufficient.

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?

The description is extremely concise and well-structured, consisting of just two sentences that directly state the purpose and return value. Every word earns its place, with no redundancy or fluff, making it easy for an agent to parse quickly.

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 the tool's low complexity (0 parameters, no output schema, no annotations), the description is minimally adequate. It explains what the tool does and what it returns, but lacks details on behavioral traits like error conditions or integration specifics. For a simple status check, this is acceptable but leaves room for improvement in completeness.

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?

The tool has 0 parameters, and the input schema description coverage is 100% (though empty). The description doesn't need to explain parameters, so it naturally compensates by focusing on the tool's function. This meets the baseline for zero-parameter tools, as there's no parameter information to add beyond what the schema provides.

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 tool's purpose: 'Check if Sketchfab integration is enabled in Blender.' It specifies the verb ('Check') and resource ('Sketchfab integration in Blender'), making the intent unambiguous. However, it doesn't explicitly differentiate from sibling tools like 'get_hyper3d_status' or 'get_polyhaven_status' beyond the resource name, 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 Guidelines2/5

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

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites, such as whether Blender must be running or if specific configurations are needed, nor does it compare to similar status-checking tools like 'get_hyper3d_status'. This lack of context leaves the agent without clear usage instructions.

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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