Function joinKeyAttributes

packages/hosts/mcp/src/tool-server.ts:1019–1022

(joinKeys: McpRequestJoinKeys)

// producer: JSON-RPC ids are small per-session integers, so a row without the
// session key would make `mcp.rpc.id` globally ambiguous.
const joinKeyAttributes = (joinKeys: McpRequestJoinKeys): Record<string, unknown> => ({
  "mcp.rpc.id": String(joinKeys.requestId),
  "mcp.request.session_id": joinKeys.sessionId ?? "",
});

const startMarker = (name: string, attributes: Record<string, unknown>): Effect.Effect<void> =>
  Effect.void.pipe(Effect.withSpan(name, { attributes }));