fix: Made the apiKey parameter optional in the TavilyAnswerTool and TavilySearchResultsTool classes

docs/_sidebar.md

@@ -128,4 +128,6 @@
     - [Tools](/modules/agents/tools/tools.md)
       - [Calculator](/modules/agents/tools/calculator.md)
       - [DALL-E Image Generator](/modules/agents/tools/openai_dall_e.md)
+      - [Tavily Answer](/modules/agents/tools/tavily_answer.md)
+      - [Tavily Search Results](/modules/agents/tools/tavily_search_results.md)
     - [Toolkits](/modules/agents/toolkits/toolkits.md)

docs/modules/agents/tools/tavily_answer.md

@@ -0,0 +1,108 @@
+# Tavily Answer
+
+## Overview
+The `TavilyAnswerTool` is part of the [Tavily Search API](https://tavily.com) integration, specifically designed to provide direct answers to queries. This tool is optimized for scenarios where you need concise, accurate responses rather than raw search results.
+
+## Installation
+
+Add these dependencies to your project:
+```yaml
+dependencies:
+  langchain: { version }
+  langchain_community: { version }
+```  
+
+Install via terminal:
+
+#### Dart
+```bash
+dart pub add langchain langchain_community
+```
+
+#### Flutter
+```bash
+flutter pub add langchain langchain_community
+```
+
+## Configuration
+
+### Authentication Options
+
+#### 1. API Key (Recommended)
+```dart
+TavilyAnswerTool(apiKey: 'your_tavily_key')
+```
+
+#### 2. Base URL Override (For proxies/custom endpoints)
+```dart
+TavilyAnswerTool(baseUrl: 'https://your-proxy.com/')
+```
+
+## Basic Usage
+
+```dart
+import 'package:langchain_community/langchain_community.dart';
+
+final tool = TavilyAnswerTool(
+  apiKey: Platform.environment['TAVILY_API_KEY'],
+);
+
+void main() async {
+  final answer = await tool.invoke('Explain quantum entanglement simply');
+  print(answer); 
+  // -> 'Quantum entanglement is a phenomenon where two or more particles...'
+}
+```
+
+## Advanced Usage
+
+### Custom Configuration with Domain Filtering
+```dart
+final expertTool = TavilyAnswerTool(
+  baseUrl: 'https://science-proxy.com/',
+  defaultOptions: const TavilyAnswerToolOptions(
+    searchDepth: TavilySearchDepth.advanced,
+    includeDomains: ['nasa.gov', 'nature.com'],
+  ),
+);
+
+void main() async {
+  final expertAnswer = await expertTool.invoke('Latest Mars rover findings');
+  print(expertAnswer);
+  // -> The latest findings from NASA's Perseverance Mars rover...
+}
+```
+
+## Agent Integration Example
+
+```dart
+void main() async {
+  final aiAgent = ToolsAgent.fromLLMAndTools(
+    llm: ChatOpenAI(apiKey: openAiKey),
+    tools: [
+      TavilyAnswerTool(apiKey: 'tavily_key'),
+      CalculatorTool(),
+    ],
+  );
+
+  final executor = AgentExecutor(agent: aiAgent);
+
+  final res = await executor.run(
+    'Calculate the GDP growth rate of France in 2023 using official sources.',
+  );
+
+  print(res);
+  // -> "The GDP growth rate of France in 2023 was 0.70%, as reported by EUROSTAT.
+}
+```
+
+## Error Handling
+
+```dart
+try {
+  return await tool.invoke(query);
+} on TavilyClientException catch (e) {
+  print('Error ${e.message}: ${e.code}');
+  return 'Failed to retrieve data';
+}
+```

docs/modules/agents/tools/tavily_search_results.md

@@ -0,0 +1,124 @@
+# Tavily Search Results
+
+## Overview
+The `TavilySearchResultsTool` is a component of the [Tavily Search API](https://tavily.com) integration that returns structured search results. This tool is ideal when you need detailed search data including sources, URLs, and confidence scores.
+
+## Installation
+
+Add these dependencies to your project:
+```yaml
+dependencies:
+  langchain: { version }
+  langchain_community: { version }
+```  
+
+Install via terminal:
+
+#### Dart
+```bash
+dart pub add langchain langchain_community
+```
+
+#### Flutter
+```bash
+flutter pub add langchain langchain_community
+```
+
+## Configuration
+
+### Authentication Options
+
+#### 1. API Key (Recommended)
+```dart
+TavilySearchResultsTool(apiKey: 'your_tavily_key')
+```
+
+#### 2. Base URL Override (For proxies/custom endpoints)
+```dart
+TavilySearchResultsTool(baseUrl: 'https://your-proxy.com/')
+```
+
+## Basic Usage
+
+```dart
+final searchTool = TavilySearchResultsTool(apiKey: 'your_key');
+
+void main() async {
+  final response = await searchTool.invoke('Latest renewable energy innovations');
+  final results = response.results;
+
+  print(results.first.title); // -> '5 smart renewable energy innovations...'
+  print(results.first.url);   // -> 'https://www.weforum.org/stories/...'
+  print(results.first.score); // -> 0.98855
+}
+```
+
+## Advanced Features
+
+### Result Processing
+```dart
+void processResults(TavilySearchResults response) {
+  // Filter high-confidence results
+  final highConfidence = results.where((r) => r.score > 0.9).toList();
+
+  // Extract URLs for verification
+  final urls = results.map((r) => r.url).toList();
+
+  // Get content from specific domains
+  final scientificSources = results.where(
+    (r) => r.url.contains('nature.com') || r.url.contains('science.org'),
+  ).toList();
+}
+```
+
+### Custom Configuration
+```dart
+final customSearchTool = TavilySearchResultsTool(
+  apiKey: 'your_key',
+  defaultOptions: const TavilySearchResultsToolOptions(
+    searchDepth: TavilySearchDepth.advanced,
+    maxResults: 10,
+    includeRawContent: true,
+    includeDomains: ['trusted-source.com'],
+    excludeDomains: ['untrusted-source.com'],
+  ),
+);
+```
+
+## Agent Integration Example
+
+```dart
+void main() async {
+  final aiAgent = ToolsAgent.fromLLMAndTools(
+    llm: ChatOpenAI(apiKey: openAiKey),
+    tools: [
+      TavilySearchResultsTool(apiKey: 'tavily_key'),
+      CalculatorTool(),
+    ],
+  );
+
+  final executor = AgentExecutor(agent: aiAgent);
+
+  final res = await executor.run(
+    'Find recent research papers on quantum computing.',
+  );
+
+  print(res);
+  // Here are some recent research papers and resources on quantum computing:
+  // 
+  // 1. **Evidence for the utility of quantum computing before fault tolerance**  
+  //    - *Published in Nature (2023)*  
+  ...
+}
+```
+
+## Error Handling
+
+```dart
+try {
+return await tool.invoke(query);
+} on TavilyClientException catch (e) {
+print('Error ${e.message}: ${e.code}');
+return 'Failed to retrieve data';
+}
+```

docs_v2/docs/05-integrations/tools/tavily_answer.md

@@ -0,0 +1,108 @@
+# Tavily Answer
+
+## Overview
+The `TavilyAnswerTool` is part of the [Tavily Search API](https://tavily.com) integration, specifically designed to provide direct answers to queries. This tool is optimized for scenarios where you need concise, accurate responses rather than raw search results.
+
+## Installation
+
+Add these dependencies to your project:
+```yaml
+dependencies:
+  langchain: { version }
+  langchain_community: { version }
+```  
+
+Install via terminal:
+
+#### Dart
+```bash
+dart pub add langchain langchain_community
+```
+
+#### Flutter
+```bash
+flutter pub add langchain langchain_community
+```
+
+## Configuration
+
+### Authentication Options
+
+#### 1. API Key (Recommended)
+```dart
+TavilyAnswerTool(apiKey: 'your_tavily_key')
+```
+
+#### 2. Base URL Override (For proxies/custom endpoints)
+```dart
+TavilyAnswerTool(baseUrl: 'https://your-proxy.com/')
+```
+
+## Basic Usage
+
+```dart
+import 'package:langchain_community/langchain_community.dart';
+
+final tool = TavilyAnswerTool(
+  apiKey: Platform.environment['TAVILY_API_KEY'],
+);
+
+void main() async {
+  final answer = await tool.invoke('Explain quantum entanglement simply');
+  print(answer);
+  // -> 'Quantum entanglement is a phenomenon where two or more particles...'
+}
+```
+
+## Advanced Usage
+
+### Custom Configuration with Domain Filtering
+```dart
+final expertTool = TavilyAnswerTool(
+  baseUrl: 'https://science-proxy.com/',
+  defaultOptions: const TavilyAnswerToolOptions(
+    searchDepth: TavilySearchDepth.advanced,
+    includeDomains: ['nasa.gov', 'nature.com'],
+  ),
+);
+
+void main() async {
+  final expertAnswer = await expertTool.invoke('Latest Mars rover findings');
+  print(expertAnswer);
+  // -> The latest findings from NASA's Perseverance Mars rover...
+}
+```
+
+## Agent Integration Example
+
+```dart
+void main() async {
+  final aiAgent = ToolsAgent.fromLLMAndTools(
+    llm: ChatOpenAI(apiKey: openAiKey),
+    tools: [
+      TavilyAnswerTool(apiKey: 'tavily_key'),
+      CalculatorTool(),
+    ],
+  );
+
+  final executor = AgentExecutor(agent: aiAgent);
+
+  final res = await executor.run(
+    'Calculate the GDP growth rate of France in 2023 using official sources.',
+  );
+
+  print(res);
+  // -> "The GDP growth rate of France in 2023 was 0.70%, as reported by EUROSTAT.
+}
+```
+
+## Error Handling
+
+```dart
+try {
+return await tool.invoke(query);
+} on TavilyClientException catch (e) {
+print('Error ${e.message}: ${e.code}');
+return 'Failed to retrieve data';
+}
+```