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aadeshrao123

Unreal-MCP

by aadeshrao123

create_blueprint

Create a new Blueprint asset from any C++ or Blueprint parent class in Unreal Engine, with support for custom paths and naming formats.

Instructions

Create a new Blueprint asset from any C++ or Blueprint parent class.

Supports parent classes from ANY module (Engine, Game, plugins, etc.). Use search_parent_classes first to find the correct name.

parent_class accepts short names ("MinerActor"), prefixed ("AMinerActor"), full paths ("/Script/Jiggify.AMinerActor"), or BP paths ("/Game/Blueprints/BP_Base").

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
pathNo/Game/Blueprints
parent_classNoActor

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

No annotations provided, so description carries full burden. It discloses that any module's parent class is supported and lists input formats, but does not mention potential errors, permissions, or behavior on invalid inputs.

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?

Three sentences with no wasted words: first states purpose, second broadens scope, third provides critical usage hint. Highly efficient.

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

Completeness4/5

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

Given the output schema exists, the description covers the main aspects: what it does, parent class formats, and prerequisite tool. Could mention that the blueprint is created at the specified path in the content browser.

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?

With 0% schema coverage, the description compensates by thoroughly explaining the parent_class parameter with examples. However, name and path parameters get no extra meaning beyond the schema defaults.

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 action 'Create a new Blueprint asset' and the resource, distinguishing it from sibling creation tools like create_material or create_data_asset.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly recommends using search_parent_classes first for finding the correct parent class name, and details acceptable formats for the parent_class parameter. Lacks explicit when-not-to-use guidance.

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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