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tinhtinhcd

mcp-blender-server

by tinhtinhcd

execute_blender_code

Run Python code in Blender to automate 3D modeling tasks. Break complex scripts into manageable steps for reliable execution.

Instructions

Execute arbitrary Python code in Blender. Make sure to do it step-by-step by breaking it into smaller chunks.

Parameters:

  • code: The Python code to execute

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
codeYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations provided, so description carries full burden. Mentions code execution but does not disclose potential destructive side effects, error handling, or safety precautions. Inadequate for arbitrary code execution.

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?

Concise two-sentence description with front-loaded purpose. However, lacks structured detail; could benefit from including safety notes or output info.

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 complexity of arbitrary code execution and lack of annotations, the description is incomplete. It does not explain return values, error states, or the behavior of Blender context, which are critical for correct usage.

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

Parameters2/5

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

Schema description coverage is 0%, yet description only restates 'The Python code to execute', adding minimal meaning beyond the parameter name. Does not provide additional details like format, limits, or examples.

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?

Clearly states it executes arbitrary Python code in Blender, which is a specific verb and resource. Differentiates from sibling tools that handle asset importing, model generation, etc.

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?

Provides a usage tip to break code into smaller chunks, but lacks explicit guidance on when to use this tool versus alternatives. No warning about potential dangers or prerequisites.

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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