docs: update icon and banner size requirements in README.md

- Icon: Must be 1:1 ratio, at least 80x80px
- Banner: Must be 16:9 ratio, at least 1200x676px

Co-Authored-By: Nicolas Arqueros <nico@dcspark.io>

README.md

@@ -4,7 +4,7 @@ A collection of official tools for Shinkai, providing various functionalities fr
 
 ## Overview
 
-This repository hosts a suite of tools designed to work with Shinkai's infrastructure
+This repository hosts a suite of tools designed to work with Shinkai's infrastructure. Each tool is built to provide specific functionality while maintaining security and reliability through Shinkai's sandboxed environment.
 
 ## Available Tools
 
@@ -26,6 +26,60 @@ Currently available tools include:
 
 And more!
 
+## Tool Spotlight: DuckDuckGo Search
+
+The DuckDuckGo Search tool demonstrates the capabilities and structure of a Shinkai tool:
+
+### Functionality
+- Performs web searches using DuckDuckGo
+- Supports both API-based and browser-based search methods
+- Returns structured results with titles, descriptions, and URLs
+
+### Implementation
+- Primary search using DuckDuckGo's API
+- Fallback to Puppeteer-based web scraping
+- Configurable Chrome path for browser automation
+
+### Required Configuration
+```json
+{
+  "chromePath": "Optional path to Chrome executable"
+}
+```
+
+### Input Parameters
+```json
+{
+  "message": "Your search query string"
+}
+```
+
+### Output Format
+```json
+{
+  "message": "[{\"title\": \"Result Title\", \"description\": \"Result Description\", \"url\": \"https://result.url\"}]",
+  "puppeteer": false
+}
+```
+
+## Tool Development Requirements
+
+### Required Files
+1. `metadata.json`: Tool configuration and interface definition
+2. `tool.ts` or `tool.py`: Implementation code
+3. `README.md`: Documentation and usage instructions
+
+### Required Assets
+1. Icon Image
+   - Dimensions: Must be 1:1 ratio, at least 80x80 pixels
+   - Format: PNG
+   - Purpose: Tool identification in UI
+
+2. Banner Image
+   - Dimensions: Must be 16:9 ratio, at least 1200x676 pixels
+   - Format: PNG
+   - Purpose: Visual representation in store
+
 ## Project Structure
 ```
 tools/