feat: Update default model to gemini-3.1-flash-audio-eap and refactor tool calling and response handling to support multiple function calls.

Author: thorwebdev

gemini-live-ephemeral-tokens-websocket/README.md

@@ -92,7 +92,7 @@ class MyTool extends FunctionCallDefinition {
 
 ## Configuration Options
 
-- **Model**: `gemini-2.5-flash-native-audio-preview-12-2025` (default)
+- **Model**: `gemini-3.1-flash-audio-eap` (default)
 - **Voice**: Puck, Charon, Kore, Fenrir, Aoede
 - **Response**: Audio, text, or both
 - **Tools**: Custom functions or Google Search grounding

gemini-live-ephemeral-tokens-websocket/frontend/geminilive.js

@@ -128,7 +128,7 @@ class FunctionCallDefinition {
         parameters
       )}`
     );
-    this.functionToCall(parameters);
+    return this.functionToCall(parameters);
   }
 }
 
@@ -246,7 +246,7 @@ class GeminiLiveAPI {
 
   callFunction(functionName, parameters) {
     const functionToCall = this.functionsMap[functionName];
-    functionToCall.runFunction(parameters);
+    return functionToCall.runFunction(parameters);
   }
 
   connect() {
@@ -345,7 +345,7 @@ class GeminiLiveAPI {
           },
         },
         systemInstruction: { parts: [{ text: this.systemInstructions }] },
-        tools: { functionDeclarations: tools },
+        tools: [{ functionDeclarations: tools }],
         // proactivity: this.proactivity,
 
         // realtimeInputConfig: {
@@ -370,12 +370,11 @@ class GeminiLiveAPI {
     }
 
     if (this.googleGrounding) {
-      sessionSetupMessage.setup.tools.googleSearch = {};
       // Currently can't have both Google Search with custom tools.
       console.log(
         "Google Grounding enabled, removing custom function calls if any."
       );
-      delete sessionSetupMessage.setup.tools.functionDeclarations;
+      sessionSetupMessage.setup.tools = [{ googleSearch: {} }];
     }
 
     // Add affective dialog if enabled
@@ -399,11 +398,10 @@ class GeminiLiveAPI {
     this.sendMessage(message);
   }
 
-  sendToolResponse(toolCallId, response) {
+  sendToolResponse(functionResponses) {
     const message = {
       toolResponse: {
-        id: toolCallId,
-        response: response,
+        functionResponses: functionResponses,
       },
     };
     console.log("🔧 Sending tool response:", message);

gemini-live-ephemeral-tokens-websocket/frontend/index.html

@@ -85,8 +85,7 @@ <h2>API Configuration</h2>
 
           <div>
             <label for="model">Model ID:</label><br />
-            <input type="text" id="model" value="gemini-2.5-flash-native-audio-preview-12-2025"
-              placeholder="Enter model ID" />
+            <input type="text" id="model" value="gemini-3.1-flash-audio-eap" placeholder="Enter model ID" />
           </div>
         </details>
 

gemini-live-ephemeral-tokens-websocket/frontend/script.js

@@ -279,17 +279,36 @@ function handleMessage(message) {
     case MultimodalLiveResponseType.TOOL_CALL:
       console.log("🛠️ Tool call received: ", message.data);
       const functionCalls = message.data.functionCalls;
+      const functionResponses = [];
       for (let index = 0; index < functionCalls.length; index++) {
         const functionCall = functionCalls[index];
         const functionName = functionCall.name;
+        const functionCallId = functionCall.id;
         const parameters = functionCall.args;
         console.log(
           `Calling function ${functionName} with parameters: ${JSON.stringify(
             parameters
           )}`
         );
-        state.client.callFunction(functionName, parameters);
+        let result;
+        try {
+          result = state.client.callFunction(functionName, parameters);
+          functionResponses.push({
+            id: functionCallId,
+            name: functionName,
+            response: { result: result ?? "ok" },
+          });
+        } catch (err) {
+          console.error(`Error calling function ${functionName}:`, err);
+          functionResponses.push({
+            id: functionCallId,
+            name: functionName,
+            response: { error: err.message },
+          });
+        }
       }
+      // Send all function responses back to the API
+      state.client.sendToolResponse(functionResponses);
       break;
 
     case MultimodalLiveResponseType.TURN_COMPLETE: