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gas_create_attribute_set

Creates a Blueprint AttributeSet asset under /Game for Unreal GAS projects, with optional parent class and overwrite controls.

Instructions

Create a Blueprint AttributeSet asset when the project supports it.

Args: name: Asset name, usually prefixed AS_. path: Destination folder under /Game. parent_class: Optional parent class path/name. Defaults to UAttributeSet. overwrite: Delete an existing asset with the same path first.

KB: see knowledge_base/19_GAMEPLAY_ABILITY_SYSTEM.md#mcp-gas-tools Example: gas_create_attribute_set(name="AS_HeroCombat", path="/Game/GAS/Attributes")

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
pathNo/Game/GAS/Attributes
overwriteNo
parent_classNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

A4.4/5.0
Behavior4/5

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

With no annotations, the description carries the behavioral disclosure burden. It explicitly discloses the overwrite side effect ('Delete an existing asset with the same path first'), states the default parent class, and notes the project-support precondition. It does not cover failure modes or transactional behavior, but the riskiest destructive action is clearly named.

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 compact and well-structured: purpose line, parameter list, KB reference, and example. Each section serves a purpose, and the example clarifies a realistic invocation without redundant prose.

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

Completeness5/5

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

For a creation tool with four parameters, the description documents every parameter, the key destructive behavior, the project-support condition, and points to the relevant knowledge base. Since an output schema is present, omitting return-value details is appropriate.

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

Parameters5/5

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

Although schema description coverage is 0%, the Args block explains all four parameters and adds real value beyond the schema: the AS_ naming convention, the '/Game' path semantics, parent_class optionality with its UAttributeSet default, and overwrite's destructive behavior.

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 opening line names a specific verb ('Create') and resource ('Blueprint AttributeSet asset'), which clearly distinguishes this from sibling GAS creation tools like gas_create_ability or gas_create_gameplay_effect. The 'when the project supports it' qualifier and KB pointer add context without obscuring the core purpose.

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

Usage Guidelines3/5

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

The description implies its usage context: create an AttributeSet asset when the project supports GAS. However, it does not explicitly state when to prefer this tool over sibling gas_create_* tools, nor does it give when-not-to-use guidance or name alternatives.

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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