> ## Documentation Index > Fetch the complete documentation index at: https://docs.voiceflow.com/llms.txt > Use this file to discover all available pages before exploring further. # Voiceflow glossary > What each term in Voiceflow means, grouped the same way the documentation is, with every entry linking to the page that explains it in full. Forty-eight terms, filed the same way the documentation is, so a word you meet while building is defined where you would look for it. Every entry links to the page that explains it properly. This glossary orients you; it is not a second source of truth. ## The shape of things A **workspace** holds **projects**. One project owns exactly one **agent**. An agent is built from playbooks and workflows, calls tools, reads a knowledge base, and ships through environments. Workspace, project and agent: the three containers everything else sits inside. Playbooks, workflows, steps, tools, and the two prompt layers that shape every turn. What an agent reads from and writes to: the knowledge base, variables and secrets. Environments, publishing, merging and traffic splits: how a change reaches real users. Transcripts, evaluations, tests and credits: reading back what an agent did. Tokens, traces, the CLI and MCP: the vocabulary for driving Voiceflow over HTTP. Model, token, RAG, embedding and grounding: industry terms as these docs use them. Capitalisation carries meaning here. "Agent step" and "Function step" name specific steps; the bare words *step* and *tool* stay lowercase.