fix: stringify output if it is not a string

Author: pietrozullo

src/agents/mcp_agent.ts

@@ -797,14 +797,32 @@ export class MCPAgent {
    * Attempt to create structured output from raw result with validation and retry logic.
    */
   private async _attemptStructuredOutput<T>(
-    rawResult: string,
+    rawResult: string | any,
     structuredLlm: BaseLanguageModelInterface,
     outputSchema: ZodSchema<T>,
     schemaDescription: string,
   ): Promise<T> {
-    logger.debug(`🔄 Attempting structured output with schema: ${outputSchema}`)
-    logger.debug(`🔄 Schema description: ${schemaDescription}`)
-    logger.debug(`🔄 Raw result: ${JSON.stringify(rawResult, null, 2)}`)
+    logger.info(`🔄 Attempting structured output with schema: ${outputSchema}`)
+    logger.info(`🔄 Schema description: ${schemaDescription}`)
+    logger.info(`🔄 Raw result: ${JSON.stringify(rawResult, null, 2)}`)
+    
+    // Handle different input formats - rawResult might be an array or object from the agent
+    let textContent: string = '';
+    if (typeof rawResult === 'string') {
+      textContent = rawResult;
+    }
+    else if (rawResult && typeof rawResult === 'object') {
+      // Handle object format
+      textContent = JSON.stringify(rawResult);
+    }
+    
+    // If we couldn't extract text, use the stringified version
+    if (!textContent) {
+      textContent = JSON.stringify(rawResult);
+    }
+    
+    
+    
     // Get detailed schema information for better prompting
     const maxRetries = 3
     let lastError: string = ''
@@ -819,8 +837,8 @@ export class MCPAgent {
       Required schema format:
       ${schemaDescription}
       
-      Content to format:
-      ${rawResult}
+      Content to extract from:
+      ${textContent}
       
       IMPORTANT: 
       - Use ONLY the field names specified in the schema