diff --git a/examples/toolbox/brave.php b/examples/toolbox/brave.php
index 43efa2ccb..633de0ada 100644
--- a/examples/toolbox/brave.php
+++ b/examples/toolbox/brave.php
@@ -12,23 +12,37 @@
 use Symfony\AI\Agent\Agent;
 use Symfony\AI\Agent\Toolbox\AgentProcessor;
 use Symfony\AI\Agent\Toolbox\Tool\Brave;
-use Symfony\AI\Agent\Toolbox\Tool\Crawler;
+use Symfony\AI\Agent\Toolbox\Tool\Clock;
+use Symfony\AI\Agent\Toolbox\Tool\Scraper;
 use Symfony\AI\Agent\Toolbox\Toolbox;
 use Symfony\AI\Platform\Bridge\OpenAi\PlatformFactory;
 use Symfony\AI\Platform\Message\Message;
 use Symfony\AI\Platform\Message\MessageBag;
+use Symfony\Component\Clock\Clock as SymfonyClock;
 
 require_once dirname(__DIR__).'/bootstrap.php';
 
 $platform = PlatformFactory::create(env('OPENAI_API_KEY'), http_client());
 
 $brave = new Brave(http_client(), env('BRAVE_API_KEY'));
-$crawler = new Crawler(http_client());
-$toolbox = new Toolbox([$brave, $crawler], logger: logger());
-$processor = new AgentProcessor($toolbox);
-$agent = new Agent($platform, 'gpt-4o-mini', [$processor], [$processor]);
+$clock = new Clock(new SymfonyClock());
+$crawler = new Scraper(http_client());
+$toolbox = new Toolbox([$brave, $clock, $crawler], logger: logger());
+$processor = new AgentProcessor($toolbox, includeSources: true);
+$agent = new Agent($platform, 'gpt-4o', [$processor], [$processor]);
 
-$messages = new MessageBag(Message::ofUser('What was the latest game result of Dallas Cowboys?'));
-$result = $agent->call($messages);
+$prompt = <<<PROMPT
+    Summarize the latest game of the Dallas Cowboys. When and where was it? Who was the opponent, what was the result,
+    and how was the game and the weather in the city. Use tools for the research and only answer based on information
+    given in the context - don't make up information.
+    PROMPT;
 
-echo $result->getContent().\PHP_EOL;
+$result = $agent->call(new MessageBag(Message::ofUser($prompt)));
+
+echo $result->getContent().\PHP_EOL.\PHP_EOL;
+
+echo 'Used sources:'.\PHP_EOL;
+foreach ($result->getMetadata()->get('sources', []) as $source) {
+    echo sprintf(' - %s (%s)', $source->getName(), $source->getReference()).\PHP_EOL;
+}
+echo \PHP_EOL;
diff --git a/examples/toolbox/serpapi.php b/examples/toolbox/serpapi.php
index 38b65677d..e64881f37 100644
--- a/examples/toolbox/serpapi.php
+++ b/examples/toolbox/serpapi.php
@@ -11,22 +11,38 @@
 
 use Symfony\AI\Agent\Agent;
 use Symfony\AI\Agent\Toolbox\AgentProcessor;
+use Symfony\AI\Agent\Toolbox\Tool\Clock;
+use Symfony\AI\Agent\Toolbox\Tool\Scraper;
 use Symfony\AI\Agent\Toolbox\Tool\SerpApi;
 use Symfony\AI\Agent\Toolbox\Toolbox;
 use Symfony\AI\Platform\Bridge\OpenAi\PlatformFactory;
 use Symfony\AI\Platform\Message\Message;
 use Symfony\AI\Platform\Message\MessageBag;
+use Symfony\Component\Clock\Clock as SymfonyClock;
 
 require_once dirname(__DIR__).'/bootstrap.php';
 
 $platform = PlatformFactory::create(env('OPENAI_API_KEY'), http_client());
 
+$clock = new Clock(new SymfonyClock());
+$crawler = new Scraper(http_client());
 $serpApi = new SerpApi(http_client(), env('SERP_API_KEY'));
-$toolbox = new Toolbox([$serpApi], logger: logger());
-$processor = new AgentProcessor($toolbox);
-$agent = new Agent($platform, 'gpt-4o-mini', [$processor], [$processor]);
+$toolbox = new Toolbox([$clock, $crawler, $serpApi], logger: logger());
+$processor = new AgentProcessor($toolbox, includeSources: true);
+$agent = new Agent($platform, 'gpt-4o', [$processor], [$processor]);
 
-$messages = new MessageBag(Message::ofUser('Who is the current chancellor of Germany?'));
-$result = $agent->call($messages);
+$prompt = <<<PROMPT
+    Summarize the latest game of the Dallas Cowboys. When and where was it? Who was the opponent, what was the result,
+    and how was the game and the weather in the city. Use tools for the research and only answer based on information
+    given in the context - don't make up information.
+    PROMPT;
 
-echo $result->getContent().\PHP_EOL;
+$result = $agent->call(new MessageBag(Message::ofUser($prompt)));
+
+echo $result->getContent().\PHP_EOL.\PHP_EOL;
+
+echo 'Used sources:'.\PHP_EOL;
+foreach ($result->getMetadata()->get('sources', []) as $source) {
+    echo sprintf(' - %s (%s)', $source->getName(), $source->getReference()).\PHP_EOL;
+}
+echo \PHP_EOL;
diff --git a/examples/toolbox/tavily.php b/examples/toolbox/tavily.php
index c9f8c06a7..f31d4729b 100644
--- a/examples/toolbox/tavily.php
+++ b/examples/toolbox/tavily.php
@@ -11,22 +11,36 @@
 
 use Symfony\AI\Agent\Agent;
 use Symfony\AI\Agent\Toolbox\AgentProcessor;
+use Symfony\AI\Agent\Toolbox\Tool\Clock;
 use Symfony\AI\Agent\Toolbox\Tool\Tavily;
 use Symfony\AI\Agent\Toolbox\Toolbox;
 use Symfony\AI\Platform\Bridge\OpenAi\PlatformFactory;
 use Symfony\AI\Platform\Message\Message;
 use Symfony\AI\Platform\Message\MessageBag;
+use Symfony\Component\Clock\Clock as SymfonyClock;
 
 require_once dirname(__DIR__).'/bootstrap.php';
 
 $platform = PlatformFactory::create(env('OPENAI_API_KEY'), http_client());
 
+$clock = new Clock(new SymfonyClock());
 $tavily = new Tavily(http_client(), env('TAVILY_API_KEY'));
-$toolbox = new Toolbox([$tavily], logger: logger());
-$processor = new AgentProcessor($toolbox);
-$agent = new Agent($platform, 'gpt-4o-mini', [$processor], [$processor]);
+$toolbox = new Toolbox([$clock, $tavily], logger: logger());
+$processor = new AgentProcessor($toolbox, includeSources: true);
+$agent = new Agent($platform, 'gpt-4o', [$processor], [$processor]);
 
-$messages = new MessageBag(Message::ofUser('What was the latest game result of Dallas Cowboys?'));
-$result = $agent->call($messages);
+$prompt = <<<PROMPT
+    Summarize the latest game of the Dallas Cowboys. When and where was it? Who was the opponent, what was the result,
+    and how was the game and the weather in the city. Use tools for the research and only answer based on information
+    given in the context - don't make up information.
+    PROMPT;
 
-echo $result->getContent().\PHP_EOL;
+$result = $agent->call(new MessageBag(Message::ofUser($prompt)));
+
+echo $result->getContent().\PHP_EOL.\PHP_EOL;
+
+echo 'Used sources:'.\PHP_EOL;
+foreach ($result->getMetadata()->get('sources', []) as $source) {
+    echo sprintf(' - %s (%s)', $source->getName(), $source->getReference()).\PHP_EOL;
+}
+echo \PHP_EOL;
diff --git a/src/agent/src/Toolbox/Source/SourceMap.php b/src/agent/src/Toolbox/Source/SourceMap.php
index eccb83e80..0ff0cc909 100644
--- a/src/agent/src/Toolbox/Source/SourceMap.php
+++ b/src/agent/src/Toolbox/Source/SourceMap.php
@@ -11,7 +11,7 @@
 
 namespace Symfony\AI\Agent\Toolbox\Source;
 
-class SourceMap
+final class SourceMap
 {
     /**
      * @var Source[]
diff --git a/src/agent/src/Toolbox/Tool/Brave.php b/src/agent/src/Toolbox/Tool/Brave.php
index f0c01d1e0..5b9e75961 100644
--- a/src/agent/src/Toolbox/Tool/Brave.php
+++ b/src/agent/src/Toolbox/Tool/Brave.php
@@ -12,6 +12,9 @@
 namespace Symfony\AI\Agent\Toolbox\Tool;
 
 use Symfony\AI\Agent\Toolbox\Attribute\AsTool;
+use Symfony\AI\Agent\Toolbox\Source\HasSourcesInterface;
+use Symfony\AI\Agent\Toolbox\Source\HasSourcesTrait;
+use Symfony\AI\Agent\Toolbox\Source\Source;
 use Symfony\AI\Platform\Contract\JsonSchema\Attribute\With;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 
@@ -19,15 +22,17 @@
  * @author Christopher Hertel <mail@christopher-hertel.de>
  */
 #[AsTool('brave_search', 'Tool that searches the web using Brave Search')]
-final readonly class Brave
+final class Brave implements HasSourcesInterface
 {
+    use HasSourcesTrait;
+
     /**
      * @param array<string, mixed> $options See https://api-dashboard.search.brave.com/app/documentation/web-search/query#WebSearchAPIQueryParameters
      */
     public function __construct(
-        private HttpClientInterface $httpClient,
-        #[\SensitiveParameter] private string $apiKey,
-        private array $options = [],
+        private readonly HttpClientInterface $httpClient,
+        #[\SensitiveParameter] private readonly string $apiKey,
+        private readonly array $options = [],
     ) {
     }
 
@@ -61,6 +66,13 @@ public function __invoke(
         ]);
 
         $data = $result->toArray();
+        $results = $data['web']['results'] ?? [];
+
+        foreach ($results as $result) {
+            $this->addSource(
+                new Source($result['title'] ?? '', $result['url'] ?? '', $result['description'] ?? '')
+            );
+        }
 
         return array_map(static function (array $result) {
             return ['title' => $result['title'], 'description' => $result['description'], 'url' => $result['url']];
diff --git a/src/agent/src/Toolbox/Tool/Clock.php b/src/agent/src/Toolbox/Tool/Clock.php
index b6df32d0a..e59f3c3e6 100644
--- a/src/agent/src/Toolbox/Tool/Clock.php
+++ b/src/agent/src/Toolbox/Tool/Clock.php
@@ -12,6 +12,9 @@
 namespace Symfony\AI\Agent\Toolbox\Tool;
 
 use Symfony\AI\Agent\Toolbox\Attribute\AsTool;
+use Symfony\AI\Agent\Toolbox\Source\HasSourcesInterface;
+use Symfony\AI\Agent\Toolbox\Source\HasSourcesTrait;
+use Symfony\AI\Agent\Toolbox\Source\Source;
 use Symfony\Component\Clock\Clock as SymfonyClock;
 use Symfony\Component\Clock\ClockInterface;
 
@@ -19,11 +22,13 @@
  * @author Christopher Hertel <mail@christopher-hertel.de>
  */
 #[AsTool('clock', description: 'Provides the current date and time.')]
-final readonly class Clock
+final class Clock implements HasSourcesInterface
 {
+    use HasSourcesTrait;
+
     public function __construct(
-        private ClockInterface $clock = new SymfonyClock(),
-        private ?string $timezone = null,
+        private readonly ClockInterface $clock = new SymfonyClock(),
+        private readonly ?string $timezone = null,
     ) {
     }
 
@@ -35,6 +40,10 @@ public function __invoke(): string
             $now = $now->setTimezone(new \DateTimeZone($this->timezone));
         }
 
+        $this->addSource(
+            new Source('Current Time', 'Clock', $now->format('Y-m-d H:i:s'))
+        );
+
         return \sprintf(
             'Current date is %s (YYYY-MM-DD) and the time is %s (HH:MM:SS).',
             $now->format('Y-m-d'),
diff --git a/src/agent/src/Toolbox/Tool/Crawler.php b/src/agent/src/Toolbox/Tool/Crawler.php
deleted file mode 100644
index 364dc6ea7..000000000
--- a/src/agent/src/Toolbox/Tool/Crawler.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\AI\Agent\Toolbox\Tool;
-
-use Symfony\AI\Agent\Exception\RuntimeException;
-use Symfony\AI\Agent\Toolbox\Attribute\AsTool;
-use Symfony\Component\DomCrawler\Crawler as DomCrawler;
-use Symfony\Contracts\HttpClient\HttpClientInterface;
-
-/**
- * @author Christopher Hertel <mail@christopher-hertel.de>
- */
-#[AsTool('crawler', 'A tool that crawls one page of a website and returns the visible text of it.')]
-final readonly class Crawler
-{
-    public function __construct(
-        private HttpClientInterface $httpClient,
-    ) {
-        if (!class_exists(DomCrawler::class)) {
-            throw new RuntimeException('For using the Crawler tool, the symfony/dom-crawler package is required. Try running "composer require symfony/dom-crawler".');
-        }
-    }
-
-    /**
-     * @param string $url the URL of the page to crawl
-     */
-    public function __invoke(string $url): string
-    {
-        $result = $this->httpClient->request('GET', $url);
-
-        return (new DomCrawler($result->getContent()))->filter('body')->text();
-    }
-}
diff --git a/src/agent/src/Toolbox/Tool/Scraper.php b/src/agent/src/Toolbox/Tool/Scraper.php
new file mode 100644
index 000000000..f3504af14
--- /dev/null
+++ b/src/agent/src/Toolbox/Tool/Scraper.php
@@ -0,0 +1,58 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\AI\Agent\Toolbox\Tool;
+
+use Symfony\AI\Agent\Exception\RuntimeException;
+use Symfony\AI\Agent\Toolbox\Attribute\AsTool;
+use Symfony\AI\Agent\Toolbox\Source\HasSourcesInterface;
+use Symfony\AI\Agent\Toolbox\Source\HasSourcesTrait;
+use Symfony\AI\Agent\Toolbox\Source\Source;
+use Symfony\Component\DomCrawler\Crawler as DomCrawler;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+
+/**
+ * @author Christopher Hertel <mail@christopher-hertel.de>
+ */
+#[AsTool('scraper', 'Loads the visible text and title of a website by URL.')]
+final class Scraper implements HasSourcesInterface
+{
+    use HasSourcesTrait;
+
+    public function __construct(
+        private readonly HttpClientInterface $httpClient,
+    ) {
+        if (!class_exists(DomCrawler::class)) {
+            throw new RuntimeException('For using the Scraper tool, the symfony/dom-crawler package is required. Try running "composer require symfony/dom-crawler".');
+        }
+    }
+
+    /**
+     * @param string $url the URL of the page to load data from
+     *
+     * @return array{title: string, content: string}
+     */
+    public function __invoke(string $url): array
+    {
+        $result = $this->httpClient->request('GET', $url);
+        $crawler = new DomCrawler($result->getContent());
+
+        $title = $crawler->filter('title')->text();
+        $content = $crawler->filter('body')->text();
+
+        $this->addSource(new Source($title, $url, $content));
+
+        return [
+            'title' => $title,
+            'content' => $content,
+        ];
+    }
+}
diff --git a/src/agent/src/Toolbox/Tool/SerpApi.php b/src/agent/src/Toolbox/Tool/SerpApi.php
index aa04e4424..08f9ea13b 100644
--- a/src/agent/src/Toolbox/Tool/SerpApi.php
+++ b/src/agent/src/Toolbox/Tool/SerpApi.php
@@ -12,24 +12,31 @@
 namespace Symfony\AI\Agent\Toolbox\Tool;
 
 use Symfony\AI\Agent\Toolbox\Attribute\AsTool;
+use Symfony\AI\Agent\Toolbox\Source\HasSourcesInterface;
+use Symfony\AI\Agent\Toolbox\Source\HasSourcesTrait;
+use Symfony\AI\Agent\Toolbox\Source\Source;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 /**
  * @author Christopher Hertel <mail@christopher-hertel.de>
  */
 #[AsTool(name: 'serpapi', description: 'search for information on the internet')]
-final readonly class SerpApi
+final class SerpApi implements HasSourcesInterface
 {
+    use HasSourcesTrait;
+
     public function __construct(
-        private HttpClientInterface $httpClient,
-        private string $apiKey,
+        private readonly HttpClientInterface $httpClient,
+        private readonly string $apiKey,
     ) {
     }
 
     /**
      * @param string $query The search query to use
+     *
+     * @return array{title: string, link: string, content: string}[]
      */
-    public function __invoke(string $query): string
+    public function __invoke(string $query): array
     {
         $result = $this->httpClient->request('GET', 'https://serpapi.com/search', [
             'query' => [
@@ -38,14 +45,19 @@ public function __invoke(string $query): string
             ],
         ]);
 
-        return \sprintf('Results for "%s" are "%s".', $query, $this->extractBestResponse($result->toArray()));
-    }
+        $data = $result->toArray();
 
-    /**
-     * @param array<string, mixed> $results
-     */
-    private function extractBestResponse(array $results): string
-    {
-        return implode('. ', array_map(fn ($story) => $story['title'], $results['organic_results']));
+        $results = [];
+        foreach ($data['organic_results'] as $result) {
+            $results[] = [
+                'title' => $result['title'],
+                'link' => $result['link'],
+                'content' => $result['snippet'],
+            ];
+
+            $this->addSource(new Source($result['title'], $result['link'], $result['snippet']));
+        }
+
+        return $results;
     }
 }
diff --git a/src/agent/src/Toolbox/Tool/Tavily.php b/src/agent/src/Toolbox/Tool/Tavily.php
index 36405b42e..cdf150b77 100644
--- a/src/agent/src/Toolbox/Tool/Tavily.php
+++ b/src/agent/src/Toolbox/Tool/Tavily.php
@@ -12,6 +12,9 @@
 namespace Symfony\AI\Agent\Toolbox\Tool;
 
 use Symfony\AI\Agent\Toolbox\Attribute\AsTool;
+use Symfony\AI\Agent\Toolbox\Source\HasSourcesInterface;
+use Symfony\AI\Agent\Toolbox\Source\HasSourcesTrait;
+use Symfony\AI\Agent\Toolbox\Source\Source;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 /**
@@ -21,15 +24,17 @@
  */
 #[AsTool('tavily_search', description: 'search for information on the internet', method: 'search')]
 #[AsTool('tavily_extract', description: 'fetch content from websites', method: 'extract')]
-final readonly class Tavily
+final class Tavily implements HasSourcesInterface
 {
+    use HasSourcesTrait;
+
     /**
      * @param array<string, string|string[]|int|bool> $options
      */
     public function __construct(
-        private HttpClientInterface $httpClient,
-        private string $apiKey,
-        private array $options = ['include_images' => false],
+        private readonly HttpClientInterface $httpClient,
+        private readonly string $apiKey,
+        private readonly array $options = ['include_images' => false],
     ) {
     }
 
@@ -45,6 +50,14 @@ public function search(string $query): string
             ]),
         ]);
 
+        $data = $result->toArray();
+
+        foreach ($data['results'] ?? [] as $item) {
+            $this->addSource(
+                new Source($item['title'] ?? '', $item['url'] ?? '', $item['raw_content'] ?? '')
+            );
+        }
+
         return $result->getContent();
     }
 
@@ -60,6 +73,14 @@ public function extract(array $urls): string
             ],
         ]);
 
+        $data = $result->toArray();
+
+        foreach ($data['results'] ?? [] as $item) {
+            $this->addSource(
+                new Source($item['title'] ?? '', $item['url'] ?? '', $item['raw_content'] ?? '')
+            );
+        }
+
         return $result->getContent();
     }
 }