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Eminemminem

BlenderMCP

by Eminemminem

get_scene_info

Retrieve comprehensive details about the current 3D scene in Blender, including objects, materials, and settings, to support AI-assisted modeling and analysis.

Instructions

Get detailed information about the current Blender scene

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • The primary handler function for the 'get_scene_info' MCP tool. It uses the @mcp.tool() decorator for registration and schema inference, connects to a Blender instance, sends a 'get_scene_info' command, and returns the JSON-formatted scene information or an error message.
    @mcp.tool()
    def get_scene_info(ctx: Context) -> str:
        """Get detailed information about the current Blender scene"""
        try:
            blender = get_blender_connection()
            result = blender.send_command("get_scene_info")
            
            # Just return the JSON representation of what Blender sent us
            return json.dumps(result, indent=2)
        except Exception as e:
            logger.error(f"Error getting scene info from Blender: {str(e)}")
            return f"Error getting scene info: {str(e)}"
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 states it 'gets detailed information' but doesn't specify what that information includes (e.g., scene properties, objects, settings), whether it's read-only (implied by 'get'), or any performance or error-handling traits. This leaves significant gaps for an agent to understand the tool's behavior.

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 a single, clear sentence that directly states the tool's purpose without any fluff or unnecessary details. It's front-loaded and efficiently communicates the core function, making it highly concise and well-structured.

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 the lack of annotations and output schema, the description is incomplete. It doesn't explain what 'detailed information' entails, such as the format or content of the returned data, which is crucial for an agent to use the tool effectively. This gap makes it inadequate for a tool that presumably returns complex scene data.

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 input schema has 0 parameters with 100% coverage, so no parameter documentation is needed. The description doesn't add param info, which is appropriate here, and it implies no inputs are required, aligning with the schema. A baseline of 4 is applied as it adequately handles the zero-param case without redundancy.

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 verb ('Get') and resource ('detailed information about the current Blender scene'), making the purpose specific and understandable. However, it doesn't explicitly differentiate from sibling tools like 'get_object_info' or 'get_hyper3d_status', which might also retrieve information but about different resources.

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 any context, prerequisites, or exclusions, such as whether it requires a Blender scene to be open or how it differs from other info-getting tools in the sibling list.

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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