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aadeshrao123

Unreal-MCP

by aadeshrao123

set_niagara_module_enabled

Enable or disable a Niagara module in an emitter's stack to control particle behavior in Unreal Engine.

Instructions

Enable or disable a module in an emitter's stack.

Args: system_path: Path to the Niagara System asset emitter_name: Name of the target emitter module_name: Name of the module script_usage: Stack the module is in enabled: True to enable, false to disable

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
enabledYes
module_nameYes
system_pathYes
emitter_nameYes
script_usageYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

With no annotations, the description carries full burden. It does not disclose side effects, safety (e.g., whether this triggers recompilation), or reversibility. Only states the boolean action.

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 concise, front-loading the purpose then listing args. It wastes no words, but could benefit from more structured parameter details.

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?

The description lacks context about return values (output schema exists but unused), prerequisites, or relationship to other tools. For a setter tool with 5 required params, more completeness is needed.

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

Parameters2/5

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

Schema coverage is 0%, so the description must explain parameters. It provides brief role descriptions (e.g., 'Path to the Niagara System asset') but no format, constraints, or examples. For 5 params, this is minimal additional value.

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 clearly states the action ('Enable or disable') and the resource ('a module in an emitter's stack'). It distinguishes from sibling tools like remove_niagara_module or add_niagara_module by focusing on the enabled state.

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 gives no guidance on when to use this tool versus alternatives, such as set_niagara_module_input or remove_niagara_module. No conditions, prerequisites, or when-not-to-use are mentioned.

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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