describe_column

Drill into one column with its bidirectional FK graph.

Layer: Physical schema

Drill into one column. Returns its structural metadata + LLM description + the join graph it participates in:

• outgoing_foreign_keys: this column joins out to where
• incoming_foreign_keys: which other tables reference this column

The bidirectional FK graph is the killer feature here — primary keys’ incoming FKs describe the entire join surface in one tool call.

Pass qualified_name as schema.table.column — e.g. "public.orders.user_id".