docs: add common readme (#34)

* docs: add common readme

* Update README.md

Author: twishabansal

README.md

@@ -1,13 +1,108 @@
 ![MCP Toolbox
 Logo](https://raw.githubusercontent.com/googleapis/genai-toolbox/main/logo.png)
-# MCP Toolbox SDKs for NodeJS
+
+# MCP Toolbox SDKs for JS
 
 [![License: Apache
 2.0](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 
-This repository contains NodeJS SDKs designed to seamlessly integrate the
+This repository contains JS SDKs designed to seamlessly integrate the
 functionalities of the [MCP
 Toolbox](https://github.com/googleapis/genai-toolbox) into your Gen AI
-applications.
+applications. These SDKs allow you to load tools defined in Toolbox and use them
+as standard JS functions or objects 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)
+- [Contributing](#contributing)
+- [License](#license)
+- [Support](#support)
+
+<!-- /TOC -->
+
+## Overview
+
+The MCP Toolbox service provides a centralized way to manage and expose tools
+(like API connectors, database query tools, etc.) for use by GenAI applications.
+
+These JS SDKs act as clients for that service. They handle the communication needed to:
+
+* Fetch tool definitions from your running Toolbox instance.
+* Provide convenient JS objects or functions representing those tools.
+* Invoke the tools (calling the underlying APIs/services configured in Toolbox).
+* Handle authentication and parameter binding as needed.
+
+By using these SDKs, you can easily leverage your Toolbox-managed tools directly
+within your JS applications or AI orchestration frameworks.
+
+## Which Package Should I Use?
+
+Choosing the right package depends on how you are building your application:
+
+- [`@toolbox/core`](https://github.com/googleapis/mcp-toolbox-sdk-js/tree/main/packages/toolbox-core):
+  This is a framework agnostic way to connect the tools to popular frameworks
+  like Langchain, LlamaIndex and Genkit.
+
+## Available Packages
+
+This repository hosts the following TS packages. See the package-specific
+README for detailed installation and usage instructions:
+
+| Package | Target Use Case | Integration | Path | Details (README) | Npm Version |
+| :------ | :---------- | :---------- | :---------------------- | :---------- | :--------- 
+| `toolbox-core` | Framework-agnostic / Custom applications | Use directly / Custom | `packages/toolbox-core/` | 📄 [View README](https://github.com/googleapis/mcp-toolbox-sdk-js/blob/main/packages/toolbox-core/README.md) | 0.1.0 |
+
+## 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 main MCP Toolbox service 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) and install it:
+
+    ```bash
+    # For the core, framework-agnostic SDK
+    npm install @toolbox/core
+    ```
+
+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.
+
+## Contributing
+
+Contributions are welcome! Please refer to the
+[`CONTRIBUTING.md`](https://github.com/googleapis/mcp-toolbox-sdk-js/blob/main/CONTRIBUTING.md)
+to get started.
+
+## License
+
+This project is licensed under the Apache License 2.0. See the
+[LICENSE](https://github.com/googleapis/mcp-toolbox-sdk-js/blob/main/LICENSE) file
+for details.
+
+## Support
 
-# TODO: Edit readme
+If you encounter issues or have questions, please check the existing [GitHub
+Issues](https://github.com/googleapis/genai-toolbox/issues) for the main Toolbox
+project. If your issue is specific to one of the SDKs, please look for existing
+issues [here](https://github.com/googleapis/mcp-toolbox-sdk-js/issues) or
+open a new issue in this repository.