W3C Trace Context bridge for the Model Context Protocol — propagate traces through MCP _meta and emit OpenTelemetry spans so Host -> MCP server -> tool -> downstream shows up as one trace.
{
"mcpServers": {
"mcp-otel-1": {
"command": "npx",
"args": [
"-y",
"mcp-otel"
]
}
}
}