The clutter-1.0.vapi for this function is as follows:

public void install_action (string action_name, uint key_val, Clutter.ModifierType modifiers, [CCode (type = "GCallback")] owned Clutter.BindingActionFunc callback);

The C header file:

void clutter_binding_pool_install_action (ClutterBindingPool  *pool,
                                          const gchar         *action_name,
                                          guint                key_val,
                                          ClutterModifierType  modifiers,
                                          GCallback            callback,
                                          gpointer             data,
                                          GDestroyNotify       notify);

This results in the following for a given valid foo.vala:
foo.c: error: too few arguments to function 'clutter_binding_pool_install_action'
/usr/include/clutter-1.0/clutter/clutter-binding-pool.h:78:23: note: declared here