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bind_event_to_dispatcher

Add a 'Bind Event' node to connect a Blueprint event to another Blueprint's Event Dispatcher. Provide the binding Blueprint, dispatcher owner, and dispatcher name.

Instructions

Bind an event to another Blueprint's Event Dispatcher. Adds a 'Bind Event to [Dispatcher]' node.

Args: blueprint_name: Blueprint that is binding to the dispatcher dispatcher_blueprint: Blueprint that owns the dispatcher dispatcher_name: Name of the event dispatcher target_variable_name: Variable holding a reference to the dispatcher owner node_position: Optional [X, Y] graph position

KB: see knowledge_base/02_BLUEPRINT_COMMUNICATION.md#overview Example: bind_event_to_dispatcher(blueprint_name="/Game/MCP_Test/BP_Example", dispatcher_blueprint="/Game/MCP_Test/BP_Example", dispatcher_name="ExampleName")

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
node_positionNo
blueprint_nameYes
dispatcher_nameYes
dispatcher_blueprintYes
target_variable_nameNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

B3.4/5.0
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. It discloses that it adds a 'Bind Event to [Dispatcher]' node, but does not mention prerequisites, side effects, failure modes, or whether it requires the dispatcher to exist. It also does not mention if it modifies the blueprint graph in a way that needs compilation. Minimal disclosure.

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 reasonably concise, with a one-sentence purpose, a structured Args list, a KB reference, and an example. The purpose is front-loaded. It is efficient but could be trimmed slightly without losing value.

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 mutation tool with no annotations and no schema descriptions, the description covers the parameters and provides an example, but lacks important context such as whether the dispatcher must already exist, what happens if binding fails, and any compilation requirements. The output schema is not described, but its existence is noted in context. Overall, adequate but with gaps.

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

Parameters4/5

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

The schema provides no descriptions (0% coverage), so the description compensates by listing all five parameters with brief explanations. It clarifies the role of each, including target_variable_name and node_position. The example further clarifies the expected format for blueprint names as paths.

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?

States a specific action (bind an event) to another Blueprint's Event Dispatcher, and explicitly mentions the node type it adds. Distinguishes from siblings like call_event_dispatcher and unbind_event_from_dispatcher.

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 guidance on when to use this tool versus alternatives. It does not mention when not to use it or which sibling tools might be more appropriate. The example shows usage but not selection criteria.

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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