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Justice219

Roblox Studio MCP Bridge

by Justice219

clone_instance

Need to duplicate an object in Roblox Studio? Specify the source instance path and a new parent path to create an exact copy.

Instructions

Clone an instance to a new parent location

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sourcePathYesDot-notation path to the instance to clone
destinationParentYesDot-notation path to the clone's new parent
Behavior2/5

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

With no annotations, the description carries the full burden of disclosing side effects. It does not state whether cloning copies children/properties, whether the source is preserved, or what the outcome is. The verb 'clone' implies a copy, but critical behavioral details are omitted.

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 efficient sentence that immediately conveys the core action and target. It is front-loaded and contains no filler.

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?

Despite a simple schema, the tool is a mutating operation with no annotations and no output schema. The description is too sparse to fully prepare an agent for the behavior, consequences, or expected results of cloning an instance.

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 fully describes both parameters (sourcePath, destinationParent) with clear dot-notation explanations. The description adds no additional parameter context, but the schema coverage is 100%, 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 ('Clone') with a clear resource ('an instance') and destination ('to a new parent location'). It effectively distinguishes the tool from siblings like move_instance and create_instance.

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 is provided on when to use this tool vs. alternatives. The description does not contrast clone_instance with move_instance or explain scenarios where cloning is preferred over moving or creating.

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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