When an agent with MCP servers configured is used as a sub-agent via
delegation, its MCP tools were not loaded because the Crew's
_prepare_tools() is not called for the delegated-to agent.
This fix adds _inject_mcp_tools() to agent/utils.py and calls it from
prepare_tools(), which is invoked by both execute_task() and
aexecute_task(). MCP tools are now loaded on-demand when the agent has
mcps configured, with deduplication and graceful error handling.
Also adds 11 tests covering:
- MCP tool injection with/without mcps
- Deduplication of existing tools
- Graceful failure handling
- prepare_tools integration
- Full delegation flow
Co-Authored-By: João <joao@crewai.com>
- Enhanced the MCP tool execution in both synchronous and asynchronous contexts by utilizing for better event loop management.
- Updated error handling to provide clearer messages for connection issues and task cancellations.
- Added tests to validate MCP tool execution in both sync and async scenarios, ensuring robust functionality across different contexts.
* WIP transport support mcp
* refactor: streamline MCP tool loading and error handling
* linted
* Self type from typing with typing_extensions in MCP transport modules
* added tests for mcp setup
* added tests for mcp setup
* docs: enhance MCP overview with detailed integration examples and structured configurations
* feat: implement MCP event handling and logging in event listener and client
- Added MCP event types and handlers for connection and tool execution events.
- Enhanced MCPClient to emit events on connection status and tool execution.
- Updated ConsoleFormatter to handle MCP event logging.
- Introduced new MCP event types for better integration and monitoring.
