diff --git a/packages/core/src/agents/local-executor.test.ts b/packages/core/src/agents/local-executor.test.ts
index fb21e1093d..f7f56288e7 100644
--- a/packages/core/src/agents/local-executor.test.ts
+++ b/packages/core/src/agents/local-executor.test.ts
@@ -344,10 +344,9 @@ describe('LocalAgentExecutor', () => {
       get: () => 'test-prompt-id',
       configurable: true,
     });
-    parentToolRegistry = new ToolRegistry(mockConfig, mockConfig.messageBus);
-    parentToolRegistry.registerTool(
-      new LSTool(mockConfig, mockConfig.messageBus),
-    );
+    const { messageBus } = mockConfig as unknown as { messageBus: MessageBus };
+    parentToolRegistry = new ToolRegistry(mockConfig, messageBus);
+    parentToolRegistry.registerTool(new LSTool(mockConfig, messageBus));
     parentToolRegistry.registerTool(
       new MockTool({ name: READ_FILE_TOOL_NAME }),
     );
@@ -687,6 +686,25 @@ describe('LocalAgentExecutor', () => {
       // Assert that there is exactly ONE schema for this tool
       expect(foundSchemas).toHaveLength(1);
     });
+
+    it('should provide tools to the model when toolConfig is OMITTED (default to all tools)', async () => {
+      const fullDefinition = createTestDefinition();
+      const { toolConfig: _, ...definition } = fullDefinition;
+
+      const executor = await LocalAgentExecutor.create(
+        definition as LocalAgentDefinition,
+        mockConfig,
+        onActivity,
+      );
+
+      const toolsList = (
+        executor as unknown as { prepareToolsList: () => FunctionDeclaration[] }
+      ).prepareToolsList();
+
+      // Verify that LS_TOOL_NAME is in the list (since LS was registered in beforeEach)
+      const toolNames = toolsList.map((t) => t.name);
+      expect(toolNames).toContain(LS_TOOL_NAME);
+    });
   });
 
   describe('run (Execution Loop and Logic)', () => {
diff --git a/packages/core/src/agents/local-executor.ts b/packages/core/src/agents/local-executor.ts
index ed26f634a0..47934ef170 100644
--- a/packages/core/src/agents/local-executor.ts
+++ b/packages/core/src/agents/local-executor.ts
@@ -1335,9 +1335,13 @@ export class LocalAgentExecutor<TOutput extends z.ZodTypeAny> {
           toolsList.push(toolRef);
         }
       }
-      // Add schemas from tools that were explicitly registered by name, wildcard, or instance.
-      toolsList.push(...this.toolRegistry.getFunctionDeclarations());
     }
+    // Add schemas from tools that were explicitly registered by name, wildcard, or instance.
+    toolsList.push(
+      ...this.toolRegistry.getFunctionDeclarations(
+        this.definition.modelConfig.model,
+      ),
+    );
 
     // Always inject complete_task.
     // Configure its schema based on whether output is expected.