Chatbot
A chatbot is a program that holds a back-and-forth text conversation, usually answering questions rather than taking action.
What it tells you about a developer
Chatbot experience covers different ground from agent experience. A chatbot that used tools to take action is a different build than one that only answered questions, and the two draw on different skills.
A chatbot combines chat, meaning a casual conversation, with bot, a program that stands in for a human. Most chatbots built on a language model answer questions, using no tools and taking no independent action, which separates them from an agent. A developer who builds a chatbot is usually focused on the conversation itself, its accuracy and its tone, more than on connecting it to outside systems.