Hydrolyzes the glucosidic bonds of unbranched Glc residues in tamarind seed xyloglucan, producing XXXG, XLXG, XXLG and XLLG. Has a low activity against beta-glucan and carboxymethylcellulose. Not active against Avicel, laminarin, xylan, galactomannan, linear and branched arabinans, galactan, polygalacturonic acid, starch, beta-D-Glcp, beta-D-cellobiose, beta-D-Galp, beta-D-Xylp, alpha-D-Xylp, alpha-L-Araf and alpha-L-Arap