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The MCP server is in public beta. It is open to use and still being refined, so tools and behavior may change.
Tool create_vault_column · Behavior Additive
Add a column to a vault, so GC AI extracts one more thing from its documents. Adding a column does NOT read the documents already in the vault: it starts empty for all of them and fills in for documents added afterwards. Backfilling the existing ones is a separate action someone takes in the app, so say so rather than waiting for values to appear. A vault holds at most 500 columns.

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Input parameters

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string (uuid)
required
The vault to add the column to.
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string
required
Column heading people see.
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string
What the AI should look for in each document. Required for an ai column, which is the default.
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string
One of: text, rich_text, date, date_range, enum, multi_enum, boolean, number, currency, percentage, duration, email, url, list. Defaults to text. enum and multi_enum need field_meta.
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object | null
The choices for an enum or multi-select column: 2 to 12 unique options. Must be null for every other column type.
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'ai' | 'manual'
ai (the default) has GC AI fill the column. manual leaves it for people to fill in.
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string
The stable key for this column in get_vault_documents. Omit and GC AI derives it from the label. It never changes, even if the label does.

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Response

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object
Last modified on September 25, 2026