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create_savegame_blueprint

Create a SaveGame Blueprint to persist player progress across sessions by defining variables like round, high score, and settings.

Instructions

Create a SaveGame Blueprint class to store persistent game data.

From Ch. 11 of the book: create BP_SaveInfo as a child of SaveGame. SaveGame Blueprints hold variables like current Round, high score, player settings, etc. that persist between play sessions.

Args: name: Blueprint name (e.g., "BP_SaveInfo") variables: List of variable definitions, each a dict with: {"name": str, "type": str, "default_value": any} Types: "Integer", "Float", "Boolean", "String", "Vector" folder_path: Content browser folder path

Example variables: [{"name": "Round", "type": "Integer", "default_value": 1}, {"name": "HighScore", "type": "Integer", "default_value": 0}]

KB: see knowledge_base/17_GAME_SYSTEMS_COOKBOOK.md#overview Example: create_savegame_blueprint(name="ExampleName")

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
variablesNo
folder_pathNo/Game/Blueprints

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

A4.2/5.0
Behavior3/5

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

With no annotations provided, the description carries the behavioral burden. It explains that the tool creates a new SaveGame child class whose variables persist between sessions, and it documents the variable schema. However, it does not disclose side effects such as whether an existing blueprint is overwritten, whether the asset is compiled or saved, or whether naming collisions are handled.

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 front-loaded with a one-sentence purpose, followed by clearly separated Args, KB reference, and example. The Ch. 11 context and persistent-data explanation add helpful context rather than noise. It is slightly longer than necessary but each section earns its place.

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?

The tool is simple enough that the description covers the essential calling contract: what it creates, how to define variables, and where the blueprint should live. The output schema exists, so return format need not be explained. The main gaps are overwrite/error behavior and clearer when-to-use guidance, but the tool is callable correctly with the provided information.

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?

Schema description coverage is 0%, so the description must fully compensate. It does: the Args block explains every parameter, gives a concrete variable-dict format with allowed types, and shows a realistic example. This is substantially more useful than the bare input schema.

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 opens with a specific verb and resource: 'Create a SaveGame Blueprint class to store persistent game data.' It clearly identifies the asset type (child of SaveGame), the typical naming convention (BP_SaveInfo), and the intended purpose, distinguishing it from generic blueprint creation tools like create_blueprint.

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?

The description gives clear usage context: this tool should be used when storing persistent game data across play sessions, such as Round, high score, and player settings. It does not explicitly name alternatives or state when not to use it, but the persistent-game-data framing provides sufficient 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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