This what Spanish powers of attorney routine say, namely the attorney-in-fact or agent can compel the principal or client to give a covenant over the property.

> a covenant given in a deed for e.g. for clear title and further assurance - e.g. to obtain missing documents to 'perfect' title - is given for land,as opposed to a warranty given in the sale of goods.

> lo obligue could refer back to lo adquirido: nmely imposing a covenant of clear title to land and builsings or warranty of title to goods.

> saneamiento para el caso de evicción : indemnification for breach of covenant of quiet anjoyment, West vs. quiet possession of goods : in either case, not a warranty against any nuisance created, but the buyer is not to be disturbed by any party claiming better entitlement to the property.

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Note added at 1 hr (2021-10-20 19:07:07 GMT)
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This is what Spanish powers of attorney routinely say .... excuse the pidgin English.

With respect to any class of goods or assets, he's entitled to sell or purchase, lest he receives possession or occupation of the acquisition or acquired item, in the tradition of assets or goods covered or protected with obligatory cleanliness.

(ES: Respecto al tipo de bienes o haberes, tiene derecho (está facultado) a vender o a comprar, al menos que reciba posesión del objeto adquirido, en la tradición de haberes protegidos con saneamiento aconsejido.)

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Note added at 6 days (2021-10-26 21:42:54 GMT)
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la protección era aconsejada