TypeError when assistant message includes tool calls
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3567414. -->
Reported by: [ademarco](https://www.drupal.org/user/186696)
Related to !10
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>When the Mistral provider receives tool calls from the model and passes them into addAssistantMessage(), it currently passes a PHP array. The upstream partitech/php-mistral library expects a ToolCallCollection instance, which causes a fatal TypeError and a 500 response in certain agent/tooling flows (notably with canvas_ai + page builder tool).</p>
<pre> public function chat(array|string|ChatInput $input, string $model_id, array $tags = []): ChatOutput {<br> ...<br><br> // Handle assistant messages with tool calls from previous turns.<br> if ($role === 'assistant' && $input_message->getTools()) {<br> $tool_calls = [];<br> foreach ($input_message->getRenderedTools() as $tool_call) {<br> $tool_calls[] = $tool_call;<br> }<br> $messages->addAssistantMessage($text, $tool_calls); <--- here<br> continue;<br> }</pre><p>Wrapping the tool calls array in new ToolCallCollection($tool_calls) fixes the issue.</p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<p>1. Enable canvas_ai.<br>
2. Enable all Canvas AI components so they are available to the agent.<br>
4. In the Canvas editor/agent UI, run a prompt that triggers a tool call, e.g.: "calling the page builder tool first, add a card component with title hello world to the content area"</p>
<p>This results in the following error:</p>
<pre>#0 /var/www/html/vendor/partitech/php-mistral/src/Messages.php(132): Partitech\PhpMistral\Message->setToolCalls()<br>#1 /var/www/html/web/modules/contrib/ai_provider_mistral/src/Plugin/AiProvider/MistralProvider.php(268): Partitech\PhpMistral\Messages->addAssistantMessage()<br>#2 [internal function]: Drupal\ai_provider_mistral\Plugin\AiProvider\MistralProvider->chat()<br>#3 /var/www/html/web/modules/contrib/ai/src/Plugin/ProviderProxy.php(269): ReflectionMethod->invokeArgs()<br>#4 /var/www/html/web/modules/contrib/ai/src/Plugin/ProviderProxy.php(133): Drupal\ai\Plugin\ProviderProxy->wrapperCall()<br>#5 /var/www/html/web/modules/contrib/ai_agents/src/PluginBase/AiAgentEntityWrapper.php(546): Drupal\ai\Plugin\ProviderProxy->__call()<br>#6 /var/www/html/web/modules/contrib/ai_agents/src/PluginBase/AiAgentEntityWrapper.php(578): Drupal\ai_agents\PluginBase\AiAgentEntityWrapper->determineSolvability()<br>#7 /var/www/html/web/modules/contrib/ai_agents/src/Plugin/AiFunctionCall/AiAgentWrapper.php(181): Drupal\ai_agents\PluginBase\AiAgentEntityWrapper->determineSolvability()<br>#8 /var/www/html/web/modules/contrib/ai_agents/src/PluginBase/AiAgentEntityWrapper.php(1184): Drupal\ai_agents\Plugin\AiFunctionCall\AiAgentWrapper->execute()<br>#9 /var/www/html/web/modules/contrib/ai_agents/src/PluginBase/AiAgentEntityWrapper.php(482): Drupal\ai_agents\PluginBase\AiAgentEntityWrapper->executeTool()<br>#10 /var/www/html/web/modules/contrib/ai_agents/src/PluginBase/AiAgentEntityWrapper.php(578): Drupal\ai_agents\PluginBase\AiAgentEntityWrapper->determineSolvability()<br>#11 /var/www/html/web/modules/contrib/canvas/modules/canvas_ai/src/Controller/CanvasBuilder.php(235): Drupal\ai_agents\PluginBase\AiAgentEntityWrapper->determineSolvability()<br>#12 [internal function]: Drupal\canvas_ai\Controller\CanvasBuilder->render()</pre><h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>Wrap $tool_calls in a ToolCallCollection before passing it to addAssistantMessage().</p>
issue
GitLab AI Context
Project: project/ai_provider_mistral
Instance: https://git.drupalcode.org
Repository: https://git.drupalcode.org/project/ai_provider_mistral
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