Description

This issue was inspired by modelcontextprotocol/modelcontextprotocol#2053. The new MCP feature will require passing io.modelcontextprotocol/server-variant _meta parameter in all requests to the MCP server. Looking at that discussion, I believe it is the new trend to implement new functionality using additional _meta properties. To support that, I want to add default _meta properties to MCPServer.

References

modelcontextprotocol/modelcontextprotocol#2053