diff --git a/src/jobs/analyze-voice-experience.ts b/src/jobs/analyze-voice-experience.ts
index 2d83aab..b1a0bb8 100644
--- a/src/jobs/analyze-voice-experience.ts
+++ b/src/jobs/analyze-voice-experience.ts
@@ -4,10 +4,14 @@ import { prisma } from '../prisma.js';
 
 type OpenRouterResponse = {
   choices?: Array<{
+    finish_reason?: string;
     message?: {
       content?: string;
     };
   }>;
+  error?: {
+    message?: string;
+  };
 };
 
 type PlaceAnalysis = {
@@ -84,11 +88,12 @@ async function buildPlaceAnalysis(input: {
       model: config.openRouterModel,
       temperature: 0.1,
       max_tokens: 900,
+      response_format: { type: 'json_object' },
       messages: [
         {
           role: 'system',
           content:
-            'You classify voice reviews about places. Return only valid JSON. Use only allowed ontology tags.',
+            'You classify voice reviews about places. Return one valid JSON object in message.content. Do not return markdown. Use only allowed ontology tags.',
         },
         {
           role: 'user',
@@ -118,13 +123,19 @@ async function buildPlaceAnalysis(input: {
   });
 
   if (!response.ok) {
-    throw new Error(`OpenRouter analysis failed with ${response.status}.`);
+    const errorBody = await response.text();
+    throw new Error(
+      `OpenRouter analysis failed with ${response.status}: ${errorBody.slice(0, 500)}`,
+    );
   }
 
   const payload = (await response.json()) as OpenRouterResponse;
-  const content = payload.choices?.[0]?.message?.content;
+  const choice = payload.choices?.[0];
+  const content = choice?.message?.content?.trim();
   if (!content) {
-    throw new Error('OpenRouter returned an empty analysis.');
+    throw new Error(
+      `OpenRouter returned an empty analysis for ${config.openRouterModel}; finish_reason=${choice?.finish_reason ?? 'missing'}.`,
+    );
   }
 
   const analysis = JSON.parse(content) as PlaceAnalysis;