docs: migration of Go Sdk docs

docs/en/sdks/go-sdk/_index.md

@@ -7,6 +7,41 @@ description: >
 ---
 
 
+## Overview
+
+![MCP Toolbox
+Logo](https://raw.githubusercontent.com/googleapis/genai-toolbox/main/logo.png)
+
+# MCP Toolbox SDKs for Go
+
+[![License: Apache
+2.0](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+[![Docs](https://img.shields.io/badge/Docs-MCP_Toolbox-blue)](https://googleapis.github.io/genai-toolbox/)
+[![Discord](https://img.shields.io/badge/Discord-%235865F2.svg?style=flat&logo=discord&logoColor=white)](https://discord.gg/Dmm69peqjh)
+[![Medium](https://img.shields.io/badge/Medium-12100E?style=flat&logo=medium&logoColor=white)](https://medium.com/@mcp_toolbox)
+[![Go Report Card](https://goreportcard.com/badge/github.com/googleapis/mcp-toolbox-sdk-go)](https://goreportcard.com/report/github.com/googleapis/mcp-toolbox-sdk-go)
+[![Module Version](https://img.shields.io/github/v/release/googleapis/mcp-toolbox-sdk-go)](https://img.shields.io/github/v/release/googleapis/mcp-toolbox-sdk-go)
+[![Go Version](https://img.shields.io/github/go-mod/go-version/googleapis/mcp-toolbox-sdk-go)](https://img.shields.io/github/go-mod/go-version/googleapis/mcp-toolbox-sdk-go)
+
+This repository contains the Go SDK designed to seamlessly integrate the
+functionalities of the [MCP
+Toolbox](https://github.com/googleapis/genai-toolbox) into your Agentic
+applications. The SDK allow you to load tools defined in Toolbox and use them
+as standard Go tools within popular orchestration frameworks
+or your custom code.
+
+This simplifies the process of incorporating external functionalities (like
+Databases or APIs) managed by Toolbox into your GenAI applications.
+
+<!-- TOC -->
+
+- [Overview](#overview)
+- [Which Package Should I Use?](#which-package-should-i-use)
+- [Available Packages](#available-packages)
+- [Getting Started](#getting-started)
+
+<!-- /TOC -->
+
 ## Overview
 
 The MCP Toolbox service provides a centralized way to manage and expose tools
@@ -22,4 +57,58 @@ The Go SDK act as clients for that service. They handle the communication needed
 By using the SDK, you can easily leverage your Toolbox-managed tools directly
 within your Go applications or AI orchestration frameworks.
 
+## Which Package Should I Use?
+
+Choosing the right package depends on how you are building your application:
+
+- [**`core`**](core/):
+  This is a framework-agnostic way to connect tools to popular frameworks
+  like Google GenAI, LangChain, etc.
+
+- [**`tbadk`**](tbadk/):
+  This package provides a way to connect tools to ADK Go.
+
+- [**`tbgenkit`**](tbgenkit/):
+  This package provides functionality to convert the Tool fetched using the core package
+  into a Genkit Go compatible tool.
+
+## Available Packages
+
+This repository hosts the following Go packages. See the package-specific
+README for detailed installation and usage instructions:
+
+| Package | Target Use Case | Integration | Path | Details (README) |
+| :------ | :----------| :---------- | :---------------------- | :---------- |
+| [`core`](core/) | Framework-agnostic / Custom applications | Use directly / Custom | `core/` | 📄 [View README](https://github.com/googleapis/mcp-toolbox-sdk-go/blob/main/core/README.md) |
+| [`tbadk`](tbadk/) | ADK Go | Use directly | `tbadk/` | 📄 [View README](https://github.com/googleapis/mcp-toolbox-sdk-go/blob/main/tbadk/README.md) |
+| [`tbgenkit`](tbgenkit/) | Genkit Go | Along with core | `tbgenkit/` | 📄 [View README](https://github.com/googleapis/mcp-toolbox-sdk-go/blob/main/tbgenkit/README.md) |
+
+## Getting Started
+
+To get started using Toolbox tools with an application, follow these general steps:
+
+1. **Set up and Run the Toolbox Service:**
+
+    Before using the SDKs, you need the MCP Toolbox server running. Follow
+    the instructions here: [**Toolbox Getting Started
+    Guide**](https://github.com/googleapis/genai-toolbox?tab=readme-ov-file#getting-started)
+
+2. **Install the Appropriate SDK:**
+
+    Choose the package based on your needs (see "[Which Package Should I Use?](#which-package-should-i-use)" above)
+    Use this command to install the SDK module
+
+    ```bash
+    # For the core, framework-agnostic SDK
+    go get github.com/googleapis/mcp-toolbox-sdk-go
+    ```
+
+3. **Use the SDK:**
+
+    Consult the `README` for your chosen package (linked in the "[Available
+    Packages](#available-packages)" section above) for detailed instructions on
+    how to connect the client, load tool definitions, invoke tools, configure
+    authentication/binding, and integrate them into your application or
+    framework.
+
 [Github](https://github.com/googleapis/mcp-toolbox-sdk-go)