This paper addresses the issue of how natural language generation technology can contribute to less intrusive wearable devices. Based on the investigation of how humans adapt the form of their utterances to the context of their hearer, we propose a strategy to relate (physical) context to the automated generation of natural language utterances. First we emphasise that different dimensions of context need to be taken into account and illustrate this with examples of lexical choice. Then we elaborate a strategy for determining sentence structure and prosody annotation based on the context relating to focus of attention. Our approach sets up an experimental basis in the context of an advice-giving wearable device (parrot).