0.04  2025-08-04
  - Added support for structured content.
  - Added output_schema attribute to MCP::Tool.
  - Added structured_result method to MCP::Tool.

0.03  2025-08-01
  - Added image_result method to MCP::Tool.
  - Improved streaming HTTP transport to use SSE for async responses.

0.02  2025-08-01
  - Fixed support for tool calls without arguments.

0.01  2025-08-01
  - First release.