/usr/include/openvdb/tools/ is in libopenvdb-dev 2.3.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/openvdb/tools/Composite.h
/usr/include/openvdb/tools/Dense.h
/usr/include/openvdb/tools/DenseSparseTools.h
/usr/include/openvdb/tools/Filter.h
/usr/include/openvdb/tools/GridOperators.h
/usr/include/openvdb/tools/GridTransformer.h
/usr/include/openvdb/tools/Interpolation.h
/usr/include/openvdb/tools/LevelSetAdvect.h
/usr/include/openvdb/tools/LevelSetFilter.h
/usr/include/openvdb/tools/LevelSetFracture.h
/usr/include/openvdb/tools/LevelSetMeasure.h
/usr/include/openvdb/tools/LevelSetMorph.h
/usr/include/openvdb/tools/LevelSetRebuild.h
/usr/include/openvdb/tools/LevelSetSphere.h
/usr/include/openvdb/tools/LevelSetTracker.h
/usr/include/openvdb/tools/LevelSetUtil.h
/usr/include/openvdb/tools/MeshToVolume.h
/usr/include/openvdb/tools/Morphology.h
/usr/include/openvdb/tools/ParticlesToLevelSet.h
/usr/include/openvdb/tools/PointAdvect.h
/usr/include/openvdb/tools/PointScatter.h
/usr/include/openvdb/tools/RayIntersector.h
/usr/include/openvdb/tools/RayTracer.h
/usr/include/openvdb/tools/Statistics.h
/usr/include/openvdb/tools/ValueTransformer.h
/usr/include/openvdb/tools/VectorTransformer.h
/usr/include/openvdb/tools/VolumeToMesh.h
/usr/include/openvdb/tools/VolumeToSpheres.h