using System;
using System.Collections.Generic;
using System.IO;
using UnityEditor;
using UnityEngine;
namespace Community.Unity.MCP
{
/// <summary>
/// MCP tools for querying Unity project assets.
/// </summary>
[McpToolProvider]
public class AssetTools
{
[McpTool("unity_get_assets", "List assets in a folder", typeof(GetAssetsArgs))]
public static object GetAssets(string argsJson)
{
var args = JsonUtility.FromJson<GetAssetsArgs>(argsJson);
var folderPath = string.IsNullOrEmpty(args?.folderPath) ? "Assets" : args.folderPath;
var filter = args?.filter ?? "";
if (!AssetDatabase.IsValidFolder(folderPath))
{
return new { error = $"Invalid folder path: {folderPath}" };
}
var guids = AssetDatabase.FindAssets(filter, new[] { folderPath });
var assets = new List<AssetInfo>();
// Limit results to prevent huge responses
var maxResults = 100;
var count = 0;
foreach (var guid in guids)
{
if (count >= maxResults) break;
var path = AssetDatabase.GUIDToAssetPath(guid);
var type = AssetDatabase.GetMainAssetTypeAtPath(path);
assets.Add(new AssetInfo
{
path = path,
name = Path.GetFileName(path),
type = type?.Name ?? "Unknown",
guid = guid
});
count++;
}
return new AssetsResult
{
folderPath = folderPath,
filter = filter,
totalCount = guids.Length,
returnedCount = assets.Count,
assets = assets.ToArray()
};
}
[McpTool("unity_get_project_settings", "Get Unity project settings")]
public static object GetProjectSettings(string argsJson)
{
string scriptingBackend = "Unknown";
string apiCompatibility = "Unknown";
try
{
// Use NamedBuildTarget for Unity 2022+ / Unity 6
var buildTarget = UnityEditor.Build.NamedBuildTarget.FromBuildTargetGroup(EditorUserBuildSettings.selectedBuildTargetGroup);
scriptingBackend = PlayerSettings.GetScriptingBackend(buildTarget).ToString();
apiCompatibility = PlayerSettings.GetApiCompatibilityLevel(buildTarget).ToString();
}
catch
{
// Fallback for older Unity versions
scriptingBackend = "N/A";
apiCompatibility = "N/A";
}
return new ProjectSettingsResult
{
productName = Application.productName,
companyName = Application.companyName,
version = Application.version,
unityVersion = Application.unityVersion,
platform = EditorUserBuildSettings.activeBuildTarget.ToString(),
scripting = scriptingBackend,
apiCompatibility = apiCompatibility
};
}
#region Data Types
[Serializable]
public class GetAssetsArgs
{
[McpParam("Folder path (defaults to 'Assets')")] public string folderPath;
[McpParam("Filter string (e.g., 't:Prefab', 't:Script', 'MyAsset')")] public string filter;
}
[Serializable]
public class AssetsResult
{
public string folderPath;
public string filter;
public int totalCount;
public int returnedCount;
public AssetInfo[] assets;
}
[Serializable]
public class AssetInfo
{
public string path;
public string name;
public string type;
public string guid;
}
[Serializable]
public class ProjectSettingsResult
{
public string productName;
public string companyName;
public string version;
public string unityVersion;
public string platform;
public string scripting;
public string apiCompatibility;
}
#endregion
}
}
