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sam-david

unreal-mcp

by sam-david

set_preset_property

Set a property value on an Unreal Engine Remote Control Preset to apply changes to exposed properties during automation.

Instructions

Set a property value exposed via a Remote Control Preset.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
valueNoProperty value to set
preset_nameYesPreset name
property_nameYesExposed property name
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. However, it only states the basic action without mentioning side effects (e.g., persistence, runtime impact), failure behavior, or required permissions. The phrase 'exposed via a Remote Control Preset' hints at context but does not reveal behavioral traits.

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 a single sentence with no wasted words, efficiently communicating the core operation. It is front-loaded and appropriately sized for a simple setter tool.

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 3-parameter setter with no output schema and no annotations, the description is adequate but thin. It does not mention success/failure semantics or prerequisites beyond the property being 'exposed', which leaves some gaps for an agent deciding whether to invoke it.

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

Parameters3/5

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

The input schema provides 100% coverage with descriptions for all three parameters (value, preset_name, property_name). The description adds no additional parameter semantics beyond restating 'property value', so the baseline of 3 is appropriate.

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 uses a specific verb ('Set') and resource ('property value exposed via a Remote Control Preset'), clearly distinguishing it from sibling tools like get_preset_property and call_preset_function. The action and target are unambiguous.

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?

Usage is implied by the verb 'set' in contrast to the sibling 'get' and 'call' tools, but there is no explicit guidance on when to use this tool versus alternatives, nor any exclusions or prerequisites.

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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