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aadeshrao123

Unreal-MCP

by aadeshrao123

add_component_to_blueprint

Add a component, like StaticMeshComponent or PointLightComponent, to a Blueprint's default components by specifying the blueprint path and component class.

Instructions

Add a component to a Blueprint's default components.

Args: blueprint_path: Full path to blueprint (e.g. "/Game/Blueprints/BP_MyActor") component_class: e.g. "StaticMeshComponent", "PointLightComponent" component_name: Optional custom name for the component

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
blueprint_pathYes
component_nameNo
component_classYes

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, so the description must carry the full burden. It states the action but does not disclose side effects (e.g., asset modification requiring save), permissions, or failure modes. The description is minimal.

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 concise: one sentence plus a clear list of parameters. Every sentence is informative, and the structure front-loads the purpose.

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

Completeness3/5

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

For a simple add operation with 3 parameters and no annotations, the description is adequate but lacks details about constraints (e.g., what happens if component already exists, if blueprint must be unmodified). The presence of an output schema slightly reduces the need, but more context would improve completeness.

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?

The input schema has 0% description coverage, but the description adds meaningful context for each parameter: blueprint_path with example path, component_class with example values, and component_name as optional. This compensates well for the schema gap.

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 verb 'Add' and the resource 'component to a Blueprint's default components'. It is specific and distinct from sibling tools like 'add_blueprint_node'.

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 guidance is provided on when to use this tool versus alternatives (e.g., 'add_blueprint_node' for graph nodes). The description does not mention prerequisites or context for usage.

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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