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unity_scene_open

Open a Unity scene by specifying its asset path, with options to save or discard unsaved changes before switching.

Instructions

Open a scene by its asset path (relative to Assets/). Refuses if any loaded scene has unsaved changes — pass saveFirst or discardUnsavedChanges.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathYesScene asset path, e.g. 'Assets/Scenes/MainScene.unity'
portNoUnity instance port (from unity_select_instance). Always include it when multiple instances run.
saveFirstNoSave all modified scenes before switching.
discardUnsavedChangesNoProceed and LOSE unsaved changes.
Behavior4/5

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

Discloses key behavior: refuses if unsaved changes, and provides two ways to proceed. Since no annotations exist, the description adequately covers 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?

Two sentences, front-loaded with action, no superfluous words. Every sentence adds necessary information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no output schema and 4 parameters, the description covers key behavior and parameter roles. Could optionally mention response or error scenarios, but adequate for use.

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?

Schema already describes each parameter fully (100% coverage). The description adds value by explaining the effect of saveFirst and discardUnsavedChanges beyond their names.

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?

Clearly states the tool opens a scene by asset path with specific behavior regarding unsaved changes. Distinct from other scene-related tools like save, new, etc.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides clear context for when to use the tool (open a scene) and the two options for handling unsaved changes. Does not explicitly mention when not to use, but it's well implied.

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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