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/** * Client Identifier Utility * Extracts client information from MCP request context */ /** * Extract client identifier from request context * Returns User-Agent for HTTP transport, "stdio" for STDIO transport * * @param extra - The extra context passed by MCP SDK to tool handlers * @returns Client identifier string (User-Agent or "stdio") */ export function getClientIdentifier(extra: any): string { // MCP SDK 1.23+ passes requestInfo in extra.requestInfo for HTTP transport const userAgent = extra?.requestInfo?.headers?.["user-agent"]; if (userAgent) { return userAgent; } // Default for STDIO mode return "stdio"; }