docs: migration of Python Sdk docs

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

@@ -22,4 +22,34 @@ These Python SDKs act as clients for that service. They handle the communication
 By using these SDKs, you can easily leverage your Toolbox-managed tools directly
 within your Python applications or AI orchestration frameworks.
 
+## Which Package Should I Use?
+
+Choosing the right package depends on how you are building your application:
+
+* [`toolbox-langchain`](https://github.com/googleapis/mcp-toolbox-sdk-python/tree/main/packages/toolbox-langchain):
+  Use this package if you are building your application using the LangChain or
+  LangGraph frameworks. It provides tools that are directly compatible with the
+  LangChain ecosystem (`BaseTool` interface), simplifying integration.
+* [`toolbox-llamaindex`](https://github.com/googleapis/mcp-toolbox-sdk-python/tree/main/packages/toolbox-llamaindex):
+  Use this package if you are building your application using the LlamaIndex framework. 
+  It provides tools that are directly compatible with the
+  LlamaIndex ecosystem (`BaseTool` interface), simplifying integration.
+* [`toolbox-core`](core):
+  Use this package if you are not using LangChain/LangGraph or any other
+  orchestration framework, or if you need a framework-agnostic way to interact
+  with Toolbox tools (e.g., for custom orchestration logic or direct use in
+  Python scripts).
+
+## Available Packages
+
+This repository hosts the following Python packages. See the package-specific
+README for detailed installation and usage instructions:
+
+| Package | Target Use Case | Integration | Path | Details (README) | PyPI Status |
+| :------ | :---------- | :---------- | :---------------------- | :---------- | :--------- 
+| `toolbox-core` | Framework-agnostic / Custom applications | Use directly / Custom | `packages/toolbox-core/` | 📄 [View README](https://github.com/googleapis/mcp-toolbox-sdk-python/blob/main/packages/toolbox-core/README.md) | ![pypi version](https://img.shields.io/pypi/v/toolbox-core.svg) |
+| `toolbox-langchain` | LangChain / LangGraph applications | LangChain / LangGraph | `packages/toolbox-langchain/` | 📄 [View README](https://github.com/googleapis/mcp-toolbox-sdk-python/blob/main/packages/toolbox-langchain/README.md) | ![pypi version](https://img.shields.io/pypi/v/toolbox-langchain.svg) |
+| `toolbox-llamaindex` | LlamaIndex  applications                 | LlamaIndex            | `packages/toolbox-llamaindex/` | 📄 [View README](https://github.com/googleapis/mcp-toolbox-sdk-python/blob/main/packages/toolbox-llamaindex/README.md) | ![pypi version](https://img.shields.io/pypi/v/toolbox-llamaindex.svg) |
+
+
 [Github](https://github.com/googleapis/mcp-toolbox-sdk-python)