  We study asymptotic charges for symmetric massless higher-spin fields on Anti
de Sitter backgrounds of arbitrary dimension within the canonical formalism. We
first analyse in detail the spin-3 example: we cast Fronsdal's action in
Hamiltonian form, we derive the charges and we propose boundary conditions on
the canonical variables that secure their finiteness. We then extend the
computation of charges and the characterisation of boundary conditions to
arbitrary spin.
