NVIDIA Auto Ontology (6,653 stars) puts a certified business dictionary in front of data agents.
Auto Ontology is an Apache-2.0 framework that drafts an ontology from database metadata, grounds agent SQL in certified terms, and exposes read-only MCP tools for Databricks, Postgres, Snowflake and DuckDB. NVIDIA's speed claims are its own and no accuracy scores are published, and the README notes passwords can sit unencrypted without Vault. The common failure for plant data agents is a wrong metric answered fast, and this puts the definitions first.
For data and OT analytics teams: keeping agents on certified metric definitions before they query plant or energy data.