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aadeshrao123

Unreal-MCP

by aadeshrao123

set_niagara_emitter_property

Modify a Niagara emitter property in Unreal Engine by providing system path, emitter name, property name, and value.

Instructions

Set a property on an emitter within a Niagara System.

Args: system_path: Path to the Niagara System asset emitter_name: Name of the target emitter property: Property name (e.g. "SimTarget", "FixedBounds", "LocalSpace") value: Property value as string

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
valueYes
propertyYes
system_pathYes
emitter_nameYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

The description provides no behavioral details beyond the basic action. No mention of side effects, validation, permissions, or what happens if the property does not exist. An output schema exists but is not referenced.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is short and includes an argument list, but the list is informal and could be more compact. It is acceptably concise but not optimally structured.

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 four required parameters and many sibling tools, the description lacks details on value serialization, error handling, and return value. The output schema is not described, leaving users to rely on external documentation.

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?

The description repeats parameter names and gives a few examples for the 'property' parameter, but adds little meaning beyond the schema. It does not clarify the expected format for system_path or emitter_name, and the 'value' parameter is only described as a string.

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 'Set' and the resource 'property on an emitter within a Niagara System', distinguishing it from sibling tools like set_niagara_system_property and set_niagara_renderer_property.

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 explicit guidance on when to use this tool versus alternatives such as set_niagara_system_property or set_niagara_renderer_property. Users must infer from the name and context.

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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