refactor: update MCP examples to use StdioConnectionParams (#457)

* refactor: swap to StdioConnectionParams

  - Fix import path to avoid ImportError
  - Changed from StdioServerParameters to StdioConnectionParams as recommended.

* fix: Re-modify imports for MCP config libraries

---------

Co-authored-by: Joe Fernandez <[email protected]>

Author: andrewginns

docs/tools/mcp-tools.md

@@ -59,7 +59,9 @@ Create an `agent.py` file (e.g., in `./adk_agent_samples/mcp_agent/agent.py`). T
 # ./adk_agent_samples/mcp_agent/agent.py
 import os # Required for path operations
 from google.adk.agents import LlmAgent
-from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset, StdioConnectionParams, StdioServerParameters
+from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset
+from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams
+from mcp import StdioServerParameters
 
 # It's good practice to define paths dynamically if possible,
 # or ensure the user understands the need for an ABSOLUTE path.
@@ -261,7 +263,9 @@ Modify your `agent.py` file (e.g., in `./adk_agent_samples/mcp_agent/agent.py`).
 # ./adk_agent_samples/mcp_agent/agent.py
 import os
 from google.adk.agents import LlmAgent
-from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset, StdioConnectionParams, StdioServerParameters
+from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset
+from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams
+from mcp import StdioServerParameters
 
 # Retrieve the API key from an environment variable or directly insert it.
 # Using an environment variable is generally safer.
@@ -605,7 +609,9 @@ Create an `agent.py` (e.g., in `./adk_agent_samples/mcp_client_agent/agent.py`):
 # ./adk_agent_samples/mcp_client_agent/agent.py
 import os
 from google.adk.agents import LlmAgent
-from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset, StdioConnectionParams, StdioServerParameters
+from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset
+from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams
+from mcp import StdioServerParameters
 
 # IMPORTANT: Replace this with the ABSOLUTE path to your my_adk_mcp_server.py script
 PATH_TO_YOUR_MCP_SERVER_SCRIPT = "/path/to/your/my_adk_mcp_server.py" # <<< REPLACE
@@ -693,7 +699,9 @@ from google.adk.agents.llm_agent import LlmAgent
 from google.adk.runners import Runner
 from google.adk.sessions import InMemorySessionService
 from google.adk.artifacts.in_memory_artifact_service import InMemoryArtifactService # Optional
-from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset, SseConnectionParams, StdioConnectionParams, StdioServerParameters
+from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset
+from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams
+from mcp import StdioServerParameters
 
 # Load environment variables from .env file in the parent directory
 # Place this near the top, before using env vars like API keys