diff --git a/agentflow/core/graph/compiled_graph.py b/agentflow/core/graph/compiled_graph.py
index d2d4886..9ac39b4 100644
--- a/agentflow/core/graph/compiled_graph.py
+++ b/agentflow/core/graph/compiled_graph.py
@@ -512,8 +512,15 @@ def attach_remote_tools(
     ):
         """Attach remote tools to a ToolNode in the graph.
 
+        Remote tools are executed by the client, not the server. The graph only
+        advertises their schemas to the model and emits a ``RemoteToolCallBlock``
+        when one is called.
+
         Args:
-            tools: List of tool configurations to attach.
+            tools: List of tool schemas in OpenAI function-calling format. Each
+                entry must be ``{"type": "function", "function": {...}}`` with a
+                ``name`` inside ``function`` -- the name is read from there to
+                route calls back to the client.
             node_name: Name of the ToolNode to attach tools to.
 
         Raises:
@@ -521,8 +528,14 @@ def attach_remote_tools(
 
         Example:
             >>> tool_configs = [
-            ...     {"name": "search", "type": "SearchTool", "config": {...}},
-            ...     {"name": "calculator", "type": "CalculatorTool", "config": {...}},
+            ...     {
+            ...         "type": "function",
+            ...         "function": {
+            ...             "name": "read_clipboard",
+            ...             "description": "Read the current clipboard text.",
+            ...             "parameters": {"type": "object", "properties": {}, "required": []},
+            ...         },
+            ...     }
             ... ]
             >>> graph.attach_remote_tools(tool_configs, "tool_node")
         """
diff --git a/agentflow/core/graph/tool_node/base.py b/agentflow/core/graph/tool_node/base.py
index 9d38864..3a02b9f 100644
--- a/agentflow/core/graph/tool_node/base.py
+++ b/agentflow/core/graph/tool_node/base.py
@@ -250,9 +250,9 @@ def all_tools_sync(
     ) -> list[dict]:
         """Synchronously get all available tools from all configured providers.
 
-        This is a synchronous wrapper around the async all_tools() method.
-        It uses asyncio.run() to handle async operations from MCP, Composio,
-        and LangChain adapters.
+        This is a synchronous wrapper around the async all_tools() method. It
+        returns the same set of tools -- local, MCP and remote -- and uses
+        asyncio.run() to handle the async MCP listing.
 
         Returns:
             List of tool definitions in OpenAI function calling format.
@@ -268,6 +268,10 @@ def all_tools_sync(
             if result:
                 tools.extend(result)
 
+        # Must mirror ``_all_tools_async``: dropping remote tools here makes
+        # client-side tools silently invisible to the model.
+        tools.extend(self.remote_tools)
+
         return tools
 
     async def invoke(
diff --git a/agentflow/prebuilt/__init__.py b/agentflow/prebuilt/__init__.py
index d09feb3..8ca30f3 100644
--- a/agentflow/prebuilt/__init__.py
+++ b/agentflow/prebuilt/__init__.py
@@ -12,6 +12,7 @@
 
 # Agents
 from .agent import (
+    AudioAgent,
     BaseReranker,
     CohereReranker,
     CrossEncoderReranker,
@@ -44,6 +45,7 @@
 
 __all__ = [
     # Agents
+    "AudioAgent",
     "BaseReranker",
     "CohereReranker",
     "CrossEncoderReranker",
diff --git a/agentflow/qa/evaluation/simulators/user_simulator.py b/agentflow/qa/evaluation/simulators/user_simulator.py
index 7024513..8a62482 100644
--- a/agentflow/qa/evaluation/simulators/user_simulator.py
+++ b/agentflow/qa/evaluation/simulators/user_simulator.py
@@ -228,9 +228,7 @@ async def run(
         # Each simulation gets its own thread_id so checkpointer state
         # doesn't bleed between concurrent or sequential runs.
         run_config = dict(config or {})
-        run_config.setdefault("configurable", {}).setdefault(
-            "thread_id", f"{scenario.scenario_id}-{uuid.uuid4().hex[:8]}"
-        )
+        run_config.setdefault("thread_id", f"{scenario.scenario_id}-{uuid.uuid4().hex[:8]}")
 
         try:
             # Start with the initial prompt
diff --git a/tests/graph/test_tool_node.py b/tests/graph/test_tool_node.py
index 763e247..6ce10f5 100644
--- a/tests/graph/test_tool_node.py
+++ b/tests/graph/test_tool_node.py
@@ -1,5 +1,6 @@
 """Tests for the tool_node module."""
 
+import asyncio
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
@@ -673,3 +674,80 @@ def sample_func() -> str:
                 assert call_args[0][0] == "mcp_tool"  # name
                 assert call_args[0][1] == {"param": "value"}  # input_data
                 assert "meta" not in call_args[1]  # no meta kwarg
+
+
+class TestToolNodeRemoteToolParity:
+    """Regression tests for issue #148.
+
+    ``all_tools_sync`` used to rebuild the tool list from local + MCP tools only and
+    never appended ``remote_tools``, so remote (client-side) tools silently vanished
+    for any caller that went through the sync accessor.
+    """
+
+    @staticmethod
+    def _remote_tool(name: str) -> dict:
+        return {
+            "type": "function",
+            "function": {
+                "name": name,
+                "description": f"Remote tool {name}.",
+                "parameters": {"type": "object", "properties": {}, "required": []},
+            },
+        }
+
+    def test_all_tools_sync_includes_remote_tools(self):
+        """Remote tools must be advertised by the sync accessor."""
+
+        def local_func() -> str:
+            """Local function."""
+            return "local"
+
+        tool_node = ToolNode([local_func])
+        tool_node.set_remote_tool([self._remote_tool("write_file")])
+
+        names = [t["function"]["name"] for t in tool_node.all_tools_sync()]
+        assert "local_func" in names
+        assert "write_file" in names
+
+    def test_sync_and_async_tool_sets_match(self):
+        """The sync and async builders must not drift apart.
+
+        Deliberately a sync test: ``all_tools_sync`` uses ``asyncio.run`` internally
+        and cannot be called from inside a running event loop.
+        """
+
+        def local_func() -> str:
+            """Local function."""
+            return "local"
+
+        mcp_tool = {
+            "type": "function",
+            "function": {
+                "name": "mcp_tool",
+                "description": "MCP tool",
+                "parameters": {"type": "object", "properties": {}},
+            },
+        }
+
+        tool_node = ToolNode([local_func], client=MagicMock())
+        tool_node.set_remote_tool([self._remote_tool("write_file")])
+
+        with patch.object(tool_node, "_get_mcp_tool", new_callable=AsyncMock) as mock_mcp:
+            mock_mcp.return_value = [mcp_tool]
+
+            async_names = {t["function"]["name"] for t in asyncio.run(tool_node.all_tools())}
+            sync_names = {t["function"]["name"] for t in tool_node.all_tools_sync()}
+
+        assert sync_names == async_names
+        assert sync_names == {"local_func", "mcp_tool", "write_file"}
+
+    def test_all_tools_sync_without_remote_tools_is_unchanged(self):
+        """No remote tools registered means nothing extra is appended."""
+
+        def local_func() -> str:
+            """Local function."""
+            return "local"
+
+        tool_node = ToolNode([local_func])
+
+        assert [t["function"]["name"] for t in tool_node.all_tools_sync()] == ["local_func"]