diff --git a/functions/_common/env.ts b/functions/_common/env.ts
index bee51a26249..a26d303d84c 100644
--- a/functions/_common/env.ts
+++ b/functions/_common/env.ts
@@ -19,3 +19,4 @@ export const extensions = {
     readme: ".readme.md",
     zip: ".zip",
 }
+export type Etag = string
diff --git a/functions/_common/fetchMetadataForGrapher.ts b/functions/_common/fetchMetadataForGrapher.ts
index 6052150d767..5df70979517 100644
--- a/functions/_common/fetchMetadataForGrapher.ts
+++ b/functions/_common/fetchMetadataForGrapher.ts
@@ -1,7 +1,7 @@
 import { Grapher } from "@ourworldindata/grapher"
 import { OwidColumnDef } from "@ourworldindata/types"
 import { StatusError } from "itty-router"
-import { createZip } from "littlezipper"
+import { createZip, File } from "littlezipper"
 import { assembleMetadata, getColumnsForMetadata } from "./metadataTools.js"
 import { Env } from "./env.js"
 import { GrapherIdentifier, initGrapher } from "./grapherTools.js"
diff --git a/functions/_common/grapherRenderer.ts b/functions/_common/grapherRenderer.ts
index 8523f2fbe62..c56b214755a 100644
--- a/functions/_common/grapherRenderer.ts
+++ b/functions/_common/grapherRenderer.ts
@@ -1,7 +1,6 @@
 import { svg2png, initialize as initializeSvg2Png } from "svg2png-wasm"
 import { TimeLogger } from "./timeLogger"
 import { png } from "itty-router"
-import { File } from "littlezipper"
 
 import svg2png_wasm from "../../node_modules/svg2png-wasm/svg2png_wasm_bg.wasm"
 
@@ -19,8 +18,6 @@ declare global {
     var window: any
 }
 
-export type Etag = string
-
 export const grapherBaseUrl = "https://ourworldindata.org/grapher"
 
 // Lots of defaults; these are mostly the same as they are in owid-grapher.
diff --git a/functions/_common/metadataTools.ts b/functions/_common/metadataTools.ts
index d67019a2157..e3ac39e965b 100644
--- a/functions/_common/metadataTools.ts
+++ b/functions/_common/metadataTools.ts
@@ -12,6 +12,22 @@ import {
     getCitationLong,
 } from "@ourworldindata/utils"
 
+interface MetadataColumn {
+    titleShort: string
+    titleLong: string
+    descriptionShort: string
+    descriptionKey: string[]
+    descriptionProcessing: string
+    shortUnit: string
+    unit: string
+    timespan: string
+    tolerance: number
+    type: string
+    conversionFactor: number
+    owidVariableId: number
+    shortName: string
+}
+
 export const getColumnsForMetadata = (grapher: Grapher) => {
     const columnsToIgnore = new Set(
         [
@@ -40,37 +56,7 @@ export function assembleMetadata(
 
     const metadataCols = getColumnsForMetadata(grapher)
 
-    const columns: [
-        string,
-        {
-            title: string
-            titleProducer: string
-            titleVariant: string
-            descriptionShort: string
-            descriptionFromProducer: string
-            descriptionKey: string[]
-            descriptionProcessing: string
-            shortUnit: string
-            unit: string
-            timespan: string
-            tolerance: number
-            type: string
-            conversionFactor: number
-            owidVariableId: number
-            catalogPath: string
-            sources: Partial<
-                Pick<
-                    OwidOrigin,
-                    | "attribution"
-                    | "attributionShort"
-                    | "description"
-                    | "urlDownload"
-                    | "urlMain"
-                >
-            >[]
-            shortName: string
-        },
-    ][] = metadataCols.map((col) => {
+    const columns: [string, MetadataColumn][] = metadataCols.map((col) => {
         console.log("mapping col", col.name)
         const {
             descriptionShort,
diff --git a/functions/_common/reusableHandlers.ts b/functions/_common/reusableHandlers.ts
index 9c0f311815e..06d7da77335 100644
--- a/functions/_common/reusableHandlers.ts
+++ b/functions/_common/reusableHandlers.ts
@@ -1,5 +1,5 @@
-import { Env } from "./env.js"
-import { Etag, fetchAndRenderGrapher } from "./grapherRenderer.js"
+import { Env, Etag } from "./env.js"
+import { fetchAndRenderGrapher } from "./grapherRenderer.js"
 import { GrapherIdentifier } from "./grapherTools.js"
 
 export async function handleThumbnailRequest(
diff --git a/functions/grapher/[slug].ts b/functions/grapher/[slug].ts
index cebee59635e..2e1e68b78cf 100644
--- a/functions/grapher/[slug].ts
+++ b/functions/grapher/[slug].ts
@@ -1,5 +1,4 @@
-import { Env, extensions } from "../_common/env.js"
-import { Etag } from "../_common/grapherRenderer.js"
+import { Env, extensions, Etag } from "../_common/env.js"
 import {
     fetchCsvForGrapher,
     fetchMetadataForGrapher,
diff --git a/functions/grapher/by-uuid/[uuid].ts b/functions/grapher/by-uuid/[uuid].ts
index c3c3e11d21b..352813a0b70 100644
--- a/functions/grapher/by-uuid/[uuid].ts
+++ b/functions/grapher/by-uuid/[uuid].ts
@@ -1,5 +1,4 @@
-import { Env } from "../../_common/env.js"
-import { extensions } from "../../_common/env.js"
+import { Env, extensions } from "../../_common/env.js"
 import { fetchGrapherConfig } from "../../_common/grapherTools.js"
 import { IRequestStrict, Router, error, StatusError } from "itty-router"
 import { handleThumbnailRequest } from "../../_common/reusableHandlers.js"