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aadeshrao123

Unreal-MCP

by aadeshrao123

set_statetree_transition_property

Modify properties of a StateTree transition, such as trigger, priority, or target state, by specifying the asset, transition index, property name, and value.

Instructions

Set a property on a transition (Trigger, Priority, TargetState, Delay, Enabled, etc.).

Args: asset_path: Content path to the StateTree asset transition_index: Index of the transition in the state's Transitions array property_name: Property to set value: New value state: State index path state_name: State name state_guid: State GUID

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
stateNo
valueYes
asset_pathYes
state_guidNo
state_nameNo
property_nameYes
transition_indexYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations were provided. The description fails to disclose any behavioral traits such as side effects (e.g., triggering recompile, validation, or irreversible changes). It only states 'Set a property' without elaborating on what happens when the property is set or any constraints. The parameter list adds no behavioral context beyond naming.

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 starts with a clear, succinct sentence defining the primary action. The subsequent parameter list is structured but slightly verbose with repetitive 'Args:' formatting. Overall, it is reasonably concise and front-loaded with the main purpose.

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 completeness for a complex tool with 7 parameters and required state identification. It does not explain the relationship between transition_index and the state's transitions, nor how to properly select the state. The existence of an output schema is not mentioned, leaving the agent without information on what the tool returns.

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 description coverage is 0%, so the description must compensate. It does add brief definitions to parameters (e.g., 'Content path to the StateTree asset' for asset_path), but fails to explain complex semantics. For instance, it does not clarify that exactly one of state, state_name, or state_guid is needed to identify the state, nor what transition_index means relative to the state's Transitions array.

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 a transition' in a StateTree asset. It lists example properties like Trigger, Priority, TargetState, which makes the action concrete. It effectively differentiates from sibling tools such as set_statetree_state_property or set_statetree_node_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?

The description provides no guidance on when to use this tool versus alternatives like remove_statetree_transition or other setter tools. It does not mention prerequisites, required context (e.g., an open StateTree asset), or when not to use it. Usage is only implied by the tool name and initial description.

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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