addition of debug print messages, bug in adapter, initializing sessions, line 113

backend/agent/coding_agent.py

@@ -20,6 +20,7 @@ import os
 import subprocess
 import sys
 from pathlib import Path
+import asyncio
 
 import requests
 import httpx
@@ -29,6 +30,9 @@ from backend.agent.mcp_server_adapter import MCPToolAdapter
 
 # ── mcp server initialization ────────────────────────────────────────────────────────────────
 adapter = MCPToolAdapter()
+print("MCPToolAdapter created. Listing all tools from servers...")
+asyncio.run(adapter.initialize_all_servers())
+print("listed tools from all servers")
 
 load_dotenv()
 
@@ -197,10 +201,11 @@ MAX_HISTORY_CHARS = 80_000
 def build_all_tool_description() -> str:
     """Get relevant tools from the MCP servers based on the query."""
 
-    relevant_tools = adapter.get_all_tools()
+    all_tools = adapter.get_all_tools()
+    print(f"Building tool description for {len(all_tools)} tools.")
 
     descriptions = []
-    for tool in relevant_tools:
+    for tool in all_tools:
         params = tool.inputSchema.get("properties", {})
         if params:
             param_lines = []

backend/agent/mcp_server_adapter.py

@@ -9,8 +9,8 @@ from mcp.client.stdio import stdio_client
 class MCPToolAdapter:
     def __init__(self, config_path: str = "mcp_server_config.json"):
         self.config_path = config_path
-        self.sessions: Dict[str, ClientSession] = {}
-        self.exit_stack: Dict[str, Any] = {}
+        self.servers: Dict[str, Dict] = {}
+        #self.exit_stack: Dict[str, Any] = {}
         self.tool_registry: List[Dict[str, Any]] = []
 
     def _load_config(self) -> Dict[str, Any]:
@@ -27,46 +27,62 @@ class MCPToolAdapter:
             print(f"Error decoding JSON config: {e}")
             return {}
 
-    async def initialize_all_sessions(self):
-        """Initialisiert alle konfigurierten MCP-Sessions und registriert die Tools."""
+    async def initialize_all_servers(self):
+        """Lädt die Konfiguration und fragt alle Server ab, um die Tools zu registrieren."""
+        print("Initializing MCP sessions...")
         config = self._load_config()
-        
+        print(f"Loaded config for servers: {list(config.keys())}")
+
         for server_name, params in config.items():
-            print(f"Initializing session for {server_name}...")
+            print(f"Testing connection to {server_name}...")
+
+            self.servers[server_name] = params
             
             server_params = StdioServerParameters(
                 command=params["command"],
-                args=params.get("args", []),
-                env=params.get("env", None),
+                args=params.get("args", [])
             )
             
             try:
-                # Verbindung aufbauen
-                transport_gen = stdio_client(server_params)
-                read, write = await transport_gen.__aenter__()
-                session = ClientSession(read, write)
-                await session.__aenter__()
-                await session.initialize()
-
-                self.sessions[server_name] = session
-                # Speichern für den Shutdown
-                self.exit_stack[server_name] = (transport_gen, session)
-
-                # Tools abrufen und registrieren
-                result = await session.list_tools()
-                # result ist oft ein Objekt, wir greifen auf das .tools Attribut zu
-                tools = getattr(result, 'tools', [])
+               # Verbindung aufbauen
+                async with stdio_client(server_params) as (read_stream, write_stream):
+                    print(f"Connected to {server_name}. Initializing session...")
+                    #print(f"read_stream: {read_stream}\nwrite_stream: {write_stream}")
+                    async with ClientSession(read_stream, write_stream) as session:
+                        await session.initialize()
+                        print(f"Session initialized for {server_name}. Requesting tools...")
+                        result = await session.list_tools()
+                        print(f"Tools received from {server_name}: {result}")
+                        tools = result.tools
+                print(f"Tools received from {server_name}: {result}")
+                #tools = getattr(result, 'tools', [])
 
                 for tool in tools:
-                    # 'tool' ist hier meist ein Tool-Objekt vom MCP SDK
+                    t_params = tool.inputSchema.get("properties", {})
+                    if t_params:
+                        param_lines = []
+                        for pname, pinfo in params.items():
+                            ptype = pinfo.get("type", "any")
+                            pdesc = pinfo.get("description", "")
+                            param_lines.append(f"    - {pname} ({ptype}): {pdesc}")
+                        param_str = "\n".join(param_lines)
+                    else:
+                        param_str = "    (none)"
+
+                    t_definition = f"- {tool.name}: {tool.description}\nParameters:\n{param_str}"
+
+
                     self.tool_registry.append({
                         "server": server_name,
-                        "name": tool.name,
-                        "definition": tool
+                        "tool_name": tool.name,
+                        "tool_description": t_definition
                     })
+
+                    print(f"Registered tool '{tool.name}' from {server_name}.")
                 
                 print(f"Session for {server_name} ready. {len(tools)} tools found.")
 
+
             except Exception as e:
                 print(f"Failed to initialize {server_name}: {e}")
 
@@ -83,11 +99,19 @@ class MCPToolAdapter:
             return f"Error: Tool '{tool_name}' not found in registry."
 
         server_name = tool_entry["server"]
-        session = self.sessions.get(server_name)
+        server = self.servers.get(server_name)
+
+        if server:
+            server_params = StdioServerParameters(
+                command=server["command"],
+                args=server.get("args", [])
+            )
 
-        if session:
             try:
-                result = await session.call_tool(tool_name, arguments)
+                async with stdio_client(server_params) as (read_stream, write_stream):
+                    async with ClientSession(read_stream, write_stream) as session:
+                        await session.initialize()
+                        result = await session.call_tool(tool_name, arguments)
                 return result
             except Exception as e:
                 return f"Error calling tool '{tool_name}' on server '{server_name}': {str(e)}"
@@ -102,4 +126,15 @@ class MCPToolAdapter:
                 await transport_gen.__aexit__(None, None, None)
                 print(f"Session for {server_name} shut down.")
             except Exception as e:
-                print(f"Error during shutdown of {server_name}: {e}")
+                print(f"Error during shutdown of {server_name}: {e}")
+
+def main():
+    adapter = MCPToolAdapter()
+    asyncio.run(adapter.initialize_all_servers())
+    print("All servers initialized. Registered tools:")
+    for tool in adapter.get_all_tools():
+        print(f"- {tool['name']} (from {tool['server']})")
+
+
+if __name__ == "__main__":
+    main()

backend/agent/mcp_server_config.json

@@ -1,10 +1,10 @@
 {"FileSearchServer": {
-    "command": "python",
+    "command": "python3",
     "args": ["servers/mcp_server_file_search.py"]
 },
 
 "WebSearchServer": {
-    "command": "python",
+    "command": "python3",
     "args": ["servers/mcp_server_web_search.py"],
     "env": {
         "DDGS_API_KEY": "your_ddgs_api_key_here"
@@ -12,7 +12,7 @@
 },
 
 "CodeExecutionServer": {
-    "command": "python",
+    "command": "python3",
     "args": ["servers/mcp_server_code_execution.py"]
 }