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aadeshrao123

Unreal-MCP

by aadeshrao123

disconnect_material_expression

Disconnect a specified input pin from a material expression node to isolate or restructure material graph connections in Unreal Engine.

Instructions

Disconnect a specific input pin on a material expression node.

Args: node_index: The target node whose input pin will be disconnected input_pin: Name of the input pin to disconnect

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
input_pinYes
node_indexYes
material_pathYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations are provided, and the description lacks behavioral details such as side effects, failure conditions, or whether the disconnection is reversible. It only states the basic action.

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 short and to the point, but it omits the material_path parameter, making it slightly incomplete. It is otherwise concise.

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?

The description is incomplete: it fails to mention the required material_path parameter and does not describe return values despite an output schema. With no annotations, more detail is needed.

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 adds some meaning for node_index and input_pin but omits material_path, which is a required parameter. With 0% schema coverage, the description should compensate, but it does not cover all parameters.

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?

The description clearly states the tool's purpose: disconnecting a specific input pin on a material expression node. The verb 'Disconnect' and the resource 'input pin' are specific. It distinguishes itself from sibling tools like connect_material_expressions.

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 does not mention prerequisites, when not to use it, or suggest other tools for related tasks.

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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