This document reports on the first focussed workshop aimed at the definition, extent, characteristics and components of an ontology ecosystem toolkit. We first provide an overview of the ontology engineering and use process, as context for the analysis of the material collected during the workshop and of other sources of requirements. The workshop itself took place on the 19th of March 2021 and involved over 100 participants. It included 11 presentations and a panel. As a way to collect information from the ontology engineering community, a questionnaire, four polls, notes and moderation of the written discussions during the workshop were used. This allowed us to better understand what tools exists to support the process creating and using ontologies in 2021, what tasks and methods were particularly important, and what gaps existed in current toolkits. As a result of this, and taking into account the broader context of the project, we provide an overview of the components to be included in the ontology ecosystem toolkit as a set of interacting services supporting the five phases of the project (requirement specification, implementation, publication, maintenance, use). We also present additional, mostly non-functional requirements related to the collaborative aspect of the process, the need for sustainable and robust tools, the user experience in applying those tools as well as the involvement of the FAIR principles in this process.