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ChengZiiii

opera-houdini-mcp

by ChengZiiii

create_node

Create a new node in Houdini by specifying its type, optional name, and parent path. Enables programmatic node creation in scene graphs.

Instructions

Create a new node in Houdini.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNo
node_typeYes
parent_pathNo/obj

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior1/5

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

With no annotations, the description must disclose behavioral implications. The single sentence only says 'Create a new node' and gives no information about side effects, required permissions, or how the node is positioned or connected. Only the input schema suggests parent_path, but the description does not elaborate.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness2/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise in the sense of being short, but it is under-specified and omits essential context. It is more of a placeholder than a well-structured description, and the single sentence does not earn its place as a useful guide.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's multiple parameters and lack of annotations, the description is highly incomplete. It does not explain the role of parent_path or name, nor how node_type works. An output schema exists, but the description still leaves significant gaps in understanding the tool's behavior.

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

Parameters1/5

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

The schema defines name, node_type, and parent_path, but the description does not mention any of them. Since schema description coverage is 0%, the description fails to add semantic meaning beyond the raw field names.

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 function: creating a node in Houdini. It uses a specific verb and resource. However, it does not distinguish itself from other creation tools such as create_wrangle or create_cop_node, which also create nodes.

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?

No usage guidance is provided. The description does not explain when to use create_node versus other tools, nor does it mention any prerequisites or alternatives. This leaves the agent without direction for tool selection.

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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