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load_scene

Load a Cinema 4D scene file to access and work with 3D models, animations, and project data for AI-assisted editing and manipulation.

Instructions

Load a Cinema 4D scene file.

Args:
    file_path: Path to the scene file to load

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
file_pathYes

Implementation Reference

  • The implementation of the load_scene tool, which sends a command to the Cinema 4D connection and returns the formatted response.
    async def load_scene(file_path: str, ctx: Context) -> str:
        """
        Load a Cinema 4D scene file.
    
        Args:
            file_path: Path to the scene file to load
        """
        async with c4d_connection_context() as connection:
            if not connection.connected:
                return "❌ Not connected to Cinema 4D"
    
            # Send command to Cinema 4D
            response = send_to_c4d(
                connection, {"command": "load_scene", "file_path": file_path}
            )
            return format_c4d_response(response, "load_scene")
  • The registration of the load_scene tool using the @mcp.tool() decorator.
    @mcp.tool()
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the action ('Load') but doesn't describe what happens during loading (e.g., whether it replaces the current scene, requires specific file formats, or has side effects like resetting settings). This leaves critical behavioral traits undocumented.

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 and front-loaded, with a clear purpose statement followed by parameter details. Both sentences earn their place, though the 'Args' section could be more integrated into the flow rather than a separate block.

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 tool's complexity (loading a scene file, which is a significant operation) and the lack of annotations and output schema, the description is incomplete. It doesn't cover behavioral aspects, error conditions, or what happens post-load, making it inadequate for safe and effective use by an agent.

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?

The description includes an 'Args' section that documents the single parameter 'file_path', adding meaning beyond the input schema (which has 0% schema description coverage). However, it only provides a basic label without details on format, constraints, or examples, offering limited compensation for the schema's lack of descriptions.

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 with a specific verb ('Load') and resource ('a Cinema 4D scene file'), making it immediately understandable. However, it doesn't explicitly differentiate from sibling tools like 'save_scene' or 'snapshot_scene', 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 (e.g., whether a scene must be closed first), compare it to similar tools like 'snapshot_scene', or specify when not to use it, leaving the agent with minimal context for decision-making.

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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