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RBG-WebDesign

MCPBridge Server

blueprint_create

Create new Unreal Engine Blueprint classes with custom components and variables. Define parent class, content path, and initial setup for programmatic asset generation.

Instructions

Create a new Blueprint class with optional components and variables.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesBlueprint name
pathNoContent directory to create in/Game/Blueprints
variablesNoVariables to add (may be skipped in 4.27 if API is limited)
componentsNoComponents to add to the Blueprint
parent_classNoParent class name (Actor, Pawn, Character, PlayerController, GameModeBase, ActorComponent, SceneComponent)Actor
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 disclosing behavioral traits, but it only states that a Blueprint class is created. It omits important details such as what happens if the asset already exists, whether compilation occurs, or any side effects, leaving the agent under-informed about the tool's runtime behavior.

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?

The description is a single, well-structured sentence that front-loads the primary action and scope. Every word contributes meaning, and there is no redundant or filler content.

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 (5 parameters, nested arrays for variables and components), the absence of an output schema, and no annotations, the description is too minimal to be contextually complete. It does not cover return values, error conditions, or operational context, leaving significant gaps for the 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 schema has 100% description coverage for all parameters, so the baseline is 3. The description adds minimal semantic value by mentioning 'optional components and variables', but it doesn't explain parameter formats, constraints, or interactions beyond what the schema already provides.

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 uses a specific verb ('Create') and identifies the resource ('Blueprint class') along with the scope of optional components and variables. It clearly conveys what the tool does, though it doesn't explicitly distinguish it from sibling tools like blueprint_build_from_json or blueprint_build_from_description.

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 such as blueprint_build_from_json or blueprint_build_from_description. It merely describes the action without mentioning prerequisites, exclusions, or contextual readiness.

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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