diff --git a/packages/agoric-cli/src/commands/oracle.js b/packages/agoric-cli/src/commands/oracle.js
index dcc4dcd88593..cd958fb609c5 100644
--- a/packages/agoric-cli/src/commands/oracle.js
+++ b/packages/agoric-cli/src/commands/oracle.js
@@ -19,6 +19,8 @@ import {
 } from '../lib/wallet.js';
 import { bigintReplacer } from '../lib/format.js';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 // XXX support other decimal places
 const COSMOS_UNIT = 1_000_000n;
 const scaleDecimals = num => BigInt(num * Number(COSMOS_UNIT));
diff --git a/packages/inter-protocol/src/auction/auctionBook.js b/packages/inter-protocol/src/auction/auctionBook.js
index e819fe8f53cb..46f63f036667 100644
--- a/packages/inter-protocol/src/auction/auctionBook.js
+++ b/packages/inter-protocol/src/auction/auctionBook.js
@@ -29,6 +29,11 @@ import {
   priceFrom,
 } from './util.js';
 
+/**
+ * @import {Baggage} from '@agoric/vat-data';
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 const { Fail } = assert;
 const { makeEmpty } = AmountMath;
 
@@ -90,8 +95,6 @@ export const makeOfferSpecShape = (bidBrand, collateralBrand) => {
   );
 };
 
-/** @import {Baggage} from '@agoric/vat-data' */
-
 /**
  * @typedef {object} BookDataNotification
  * @property {Ratio | null} startPrice identifies the priceAuthority and price
diff --git a/packages/inter-protocol/src/auction/auctioneer.js b/packages/inter-protocol/src/auction/auctioneer.js
index ee5339c94897..8807b00f5a16 100644
--- a/packages/inter-protocol/src/auction/auctioneer.js
+++ b/packages/inter-protocol/src/auction/auctioneer.js
@@ -35,7 +35,10 @@ import { auctioneerParamTypes } from './params.js';
 import { makeScheduler } from './scheduler.js';
 import { AuctionState } from './util.js';
 
-/** @import {Baggage} from '@agoric/vat-data' */
+/**
+ * @import {Baggage} from '@agoric/vat-data';
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
 
 const { Fail, quote: q } = assert;
 const { add, multiply } = natSafeMath;
diff --git a/packages/inter-protocol/src/auction/params.js b/packages/inter-protocol/src/auction/params.js
index 71e660ddabe4..c4bb7bf13285 100644
--- a/packages/inter-protocol/src/auction/params.js
+++ b/packages/inter-protocol/src/auction/params.js
@@ -6,8 +6,11 @@ import {
 import { TimeMath, RelativeTimeRecordShape } from '@agoric/time';
 import { M } from '@agoric/store';
 
-/** @import {AsyncSpecTuple} from '@agoric/governance/src/contractGovernance/typedParamManager.js' */
-/** @import {SyncSpecTuple} from '@agoric/governance/src/contractGovernance/typedParamManager.js' */
+/**
+ * @import {AsyncSpecTuple} from '@agoric/governance/src/contractGovernance/typedParamManager.js';
+ * @import {SyncSpecTuple} from '@agoric/governance/src/contractGovernance/typedParamManager.js';
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
 
 // TODO duplicated with zoe/src/TypeGuards.js
 export const InvitationShape = M.remotable('Invitation');
diff --git a/packages/inter-protocol/src/auction/util.js b/packages/inter-protocol/src/auction/util.js
index 2a844c6ea82f..3099285b9d2d 100644
--- a/packages/inter-protocol/src/auction/util.js
+++ b/packages/inter-protocol/src/auction/util.js
@@ -7,6 +7,8 @@ import {
 } from '@agoric/zoe/src/contractSupport/index.js';
 import { Far } from '@endo/marshal';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 /**
  * Constants for Auction State.
  *
diff --git a/packages/inter-protocol/src/contractSupport.js b/packages/inter-protocol/src/contractSupport.js
index 59d7c89d5c3c..1aec13135a99 100644
--- a/packages/inter-protocol/src/contractSupport.js
+++ b/packages/inter-protocol/src/contractSupport.js
@@ -4,6 +4,8 @@ import { AmountMath } from '@agoric/ertp';
 import { M } from '@agoric/store';
 import { makeRatioFromAmounts } from '@agoric/zoe/src/contractSupport/index.js';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 const { Fail, quote: q } = assert;
 
 export const amountPattern = harden({ brand: M.remotable(), value: M.any() });
diff --git a/packages/inter-protocol/src/price/fluxAggregatorKit.js b/packages/inter-protocol/src/price/fluxAggregatorKit.js
index 950e809da7c6..164a5997da6a 100644
--- a/packages/inter-protocol/src/price/fluxAggregatorKit.js
+++ b/packages/inter-protocol/src/price/fluxAggregatorKit.js
@@ -18,6 +18,8 @@ import { Far } from '@endo/marshal';
 import { prepareOracleAdminKit } from './priceOracleKit.js';
 import { prepareRoundsManagerKit } from './roundsManager.js';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 const trace = makeTracer('FlxAgg', true);
 
 export const INVITATION_MAKERS_DESC = 'oracle invitation';
diff --git a/packages/inter-protocol/src/price/roundsManager.js b/packages/inter-protocol/src/price/roundsManager.js
index 780c6942af37..2d4c1256824a 100644
--- a/packages/inter-protocol/src/price/roundsManager.js
+++ b/packages/inter-protocol/src/price/roundsManager.js
@@ -14,10 +14,10 @@ import { UnguardedHelperI } from '@agoric/internal/src/typeGuards.js';
 
 const { add, subtract, multiply, floorDivide, ceilDivide, isGTE } = natSafeMath;
 
-/** @import {OracleStatus} from './priceOracleKit.js' */
 /**
- * @import {Timestamp} from '@agoric/time'
- * @import {TimerService} from '@agoric/time'
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ * @import {Timestamp, TimerService} from '@agoric/time'
+ * @import {OracleStatus} from './priceOracleKit.js'
  */
 
 /** @type {string} */
diff --git a/packages/inter-protocol/src/vaultFactory/liquidation.js b/packages/inter-protocol/src/vaultFactory/liquidation.js
index 8cf72418997d..2c992d150868 100644
--- a/packages/inter-protocol/src/vaultFactory/liquidation.js
+++ b/packages/inter-protocol/src/vaultFactory/liquidation.js
@@ -17,6 +17,7 @@ const trace = makeTracer('LIQ');
 /** @import {TimerWaker} from '@agoric/time' */
 /** @import {CancelToken} from '@agoric/time' */
 /** @import {RelativeTimeRecord} from '@agoric/time' */
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
 
 const makeCancelToken = makeCancelTokenMaker('liq');
 
diff --git a/packages/inter-protocol/src/vaultFactory/math.js b/packages/inter-protocol/src/vaultFactory/math.js
index 5583ffc16db0..9b42e0af2477 100644
--- a/packages/inter-protocol/src/vaultFactory/math.js
+++ b/packages/inter-protocol/src/vaultFactory/math.js
@@ -16,6 +16,8 @@ import {
 import { priceFrom } from '../auction/util.js';
 import { addSubtract } from '../contractSupport.js';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 /**
  * Calculate the minimum collateralization given the liquidation margin and the
  * "padding" from that liquidation threshold.
diff --git a/packages/inter-protocol/src/vaultFactory/params.js b/packages/inter-protocol/src/vaultFactory/params.js
index 239a33ce53f3..8a92143cabf4 100644
--- a/packages/inter-protocol/src/vaultFactory/params.js
+++ b/packages/inter-protocol/src/vaultFactory/params.js
@@ -14,6 +14,8 @@ import { provideDurableMapStore } from '@agoric/vat-data';
 import { subtractRatios } from '@agoric/zoe/src/contractSupport/ratio.js';
 import { amountPattern, ratioPattern } from '../contractSupport.js';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 export const CHARGING_PERIOD_KEY = 'ChargingPeriod';
 export const RECORDING_PERIOD_KEY = 'RecordingPeriod';
 
diff --git a/packages/inter-protocol/src/vaultFactory/proceeds.js b/packages/inter-protocol/src/vaultFactory/proceeds.js
index eaeb0c5b2d6c..70f9aa3b0d20 100644
--- a/packages/inter-protocol/src/vaultFactory/proceeds.js
+++ b/packages/inter-protocol/src/vaultFactory/proceeds.js
@@ -9,6 +9,8 @@ import {
 import { quoteAsRatio, subtractToEmpty } from '../contractSupport.js';
 import { liquidationResults } from './liquidation.js';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 /**
  * @typedef {{
  *   overage: Amount<'nat'>;
diff --git a/packages/inter-protocol/src/vaultFactory/storeUtils.js b/packages/inter-protocol/src/vaultFactory/storeUtils.js
index 8caae9c7da39..55fea23f9c19 100644
--- a/packages/inter-protocol/src/vaultFactory/storeUtils.js
+++ b/packages/inter-protocol/src/vaultFactory/storeUtils.js
@@ -5,6 +5,8 @@
  * API supports them.
  */
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 // XXX importing these that are declared to be used only for testing
 // until @agoric/store supports composite keys
 import { makeDecodePassable, makeEncodePassable } from '@endo/marshal';
diff --git a/packages/inter-protocol/src/vaultFactory/types.js b/packages/inter-protocol/src/vaultFactory/types.js
index 2286f312a3b0..cc6cdd0fe7e3 100644
--- a/packages/inter-protocol/src/vaultFactory/types.js
+++ b/packages/inter-protocol/src/vaultFactory/types.js
@@ -76,7 +76,7 @@
  * @typedef {object} GetVaultParams
  * @property {() => Ratio} getLiquidationMargin
  * @property {() => Ratio} getMintFee
- * @property {() => Promise<PriceQuote>} getCollateralQuote
+ * @property {() => Promise<import('@agoric/zoe/tools/types.js').PriceQuote>} getCollateralQuote
  * @property {() => Ratio} getInterestRate - The annual interest rate on a debt
  *   position
  * @property {() => RelativeTime} getChargingPeriod - The period (in seconds) at
diff --git a/packages/inter-protocol/src/vaultFactory/vaultFactory.js b/packages/inter-protocol/src/vaultFactory/vaultFactory.js
index e7ae15ff6523..cce581eef8d1 100644
--- a/packages/inter-protocol/src/vaultFactory/vaultFactory.js
+++ b/packages/inter-protocol/src/vaultFactory/vaultFactory.js
@@ -32,6 +32,8 @@ import { InvitationShape } from '../auction/params.js';
 import { SHORTFALL_INVITATION_KEY, vaultDirectorParamTypes } from './params.js';
 import { provideDirector } from './vaultDirector.js';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 const trace = makeTracer('VF', true);
 
 /**
diff --git a/packages/inter-protocol/src/vaultFactory/vaultManager.js b/packages/inter-protocol/src/vaultFactory/vaultManager.js
index e3ea552a8fc4..d4e39a390555 100644
--- a/packages/inter-protocol/src/vaultFactory/vaultManager.js
+++ b/packages/inter-protocol/src/vaultFactory/vaultManager.js
@@ -64,6 +64,11 @@ import { makePrioritizedVaults } from './prioritizedVaults.js';
 import { Phase, prepareVault } from './vault.js';
 import { calculateDistributionPlan } from './proceeds.js';
 
+/**
+ * @import {Baggage} from '@agoric/vat-data';
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 const { details: X, Fail, quote: q } = assert;
 
 const trace = makeTracer('VM');
diff --git a/packages/inter-protocol/test/vaultFactory/test-collatRatio.js b/packages/inter-protocol/test/vaultFactory/test-collatRatio.js
index fb67b32629e1..d51e5e088832 100644
--- a/packages/inter-protocol/test/vaultFactory/test-collatRatio.js
+++ b/packages/inter-protocol/test/vaultFactory/test-collatRatio.js
@@ -8,6 +8,8 @@ import { makeRatioFromAmounts } from '@agoric/zoe/src/contractSupport/index.js';
 import { normalizedCollRatio } from '../../src/vaultFactory/storeUtils.js';
 import { withAmountUtils } from '../supports.js';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 export const mockBrand = Far('brand');
 
 const makeFakeQuote = (amountIn, amountOut) => {
diff --git a/packages/inter-protocol/test/vaultFactory/test-math.js b/packages/inter-protocol/test/vaultFactory/test-math.js
index a96a1b90b5d2..cd987df2c991 100644
--- a/packages/inter-protocol/test/vaultFactory/test-math.js
+++ b/packages/inter-protocol/test/vaultFactory/test-math.js
@@ -7,7 +7,10 @@ import {
 } from '../../src/vaultFactory/math.js';
 import { withAmountUtils } from '../supports.js';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 const stable = withAmountUtils(makeIssuerKit('Stable'));
+
 const aeth = withAmountUtils(makeIssuerKit('Aeth'));
 
 //#region maxDebtForVaults
diff --git a/packages/inter-protocol/test/vaultFactory/test-proceeds.js b/packages/inter-protocol/test/vaultFactory/test-proceeds.js
index 3c3aa5f5da80..67034e298844 100644
--- a/packages/inter-protocol/test/vaultFactory/test-proceeds.js
+++ b/packages/inter-protocol/test/vaultFactory/test-proceeds.js
@@ -7,6 +7,8 @@ import { makeRatio } from '@agoric/zoe/src/contractSupport/index.js';
 import { calculateDistributionPlan } from '../../src/vaultFactory/proceeds.js';
 import { withAmountUtils } from '../supports.js';
 
+/** @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js'; */
+
 const debt = withAmountUtils(makeIssuerKit('IST'));
 const coll = withAmountUtils(makeIssuerKit('aEth'));
 
diff --git a/packages/inter-protocol/test/vaultFactory/test-vaultFactory.js b/packages/inter-protocol/test/vaultFactory/test-vaultFactory.js
index 9ce6fec7dab6..aba4a9c8c011 100644
--- a/packages/inter-protocol/test/vaultFactory/test-vaultFactory.js
+++ b/packages/inter-protocol/test/vaultFactory/test-vaultFactory.js
@@ -40,7 +40,10 @@ import {
   setupElectorateReserveAndAuction,
 } from './vaultFactoryUtils.js';
 
-/** @import {VaultFactoryContract as VFC} from '../../src/vaultFactory/vaultFactory.js' */
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ * @import {VaultFactoryContract as VFC} from '../../src/vaultFactory/vaultFactory.js'
+ */
 
 /**
  * @typedef {Record<string, any> & {
diff --git a/packages/vats/src/priceAuthorityRegistry.js b/packages/vats/src/priceAuthorityRegistry.js
index 85b8570f73d6..eb8bb0e30133 100644
--- a/packages/vats/src/priceAuthorityRegistry.js
+++ b/packages/vats/src/priceAuthorityRegistry.js
@@ -10,6 +10,11 @@ import { E } from '@endo/far';
 import { Far } from '@endo/marshal';
 import { PriceAuthorityI } from '@agoric/zoe/src/contractSupport/priceAuthority.js';
 
+/**
+ * @import {Baggage} from '@agoric/vat-data';
+ * @import {MutableQuote, PriceAuthority, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 const { Fail } = assert;
 
 /**
diff --git a/packages/zoe/exported.js b/packages/zoe/exported.js
index e3828978f722..7f0c9e62f9cd 100644
--- a/packages/zoe/exported.js
+++ b/packages/zoe/exported.js
@@ -5,7 +5,6 @@ import './src/zoeService/types-ambient.js';
 import './src/contractSupport/types-ambient.js';
 import './src/contracts/exported.js';
 import './src/types-ambient.js';
-import './tools/types-ambient.js';
 import '@agoric/notifier/exported.js';
 import '@agoric/ertp/exported.js';
 import '@agoric/store/exported.js';
diff --git a/packages/zoe/package.json b/packages/zoe/package.json
index 3cdfbbf51bdc..e5f3699fce06 100644
--- a/packages/zoe/package.json
+++ b/packages/zoe/package.json
@@ -10,8 +10,8 @@
   "scripts": {
     "build": "yarn build:bundles",
     "build:bundles": "node scripts/build-bundles.js",
-    "prepack": "echo \"export {}; \" | cat - tools/types-ambient.js > tools/types.js && tsc --build tsconfig.build.json",
-    "postpack": "git clean -f '*.d.ts*' tools/types.js",
+    "prepack": "tsc --build tsconfig.build.json",
+    "postpack": "git clean -f '*.d.ts*'",
     "test": "ava --verbose",
     "test:c8": "c8 $C8_OPTIONS ava --config=ava-nesm.config.js",
     "test:unit": "ava 'test/unitTests/**/test-*.js' -T 1m --verbose",
diff --git a/packages/zoe/src/contractSupport/priceAuthority.js b/packages/zoe/src/contractSupport/priceAuthority.js
index 99b7d71b2667..a3510f7eb23d 100644
--- a/packages/zoe/src/contractSupport/priceAuthority.js
+++ b/packages/zoe/src/contractSupport/priceAuthority.js
@@ -8,6 +8,10 @@ import { makeTracer } from '@agoric/internal';
 import { TimestampShape } from '@agoric/time';
 import { M } from '@agoric/store';
 
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery, PriceQuoteCreate, PriceAuthorityKit, PriceQuoteTrigger, MutableQuote,} from '@agoric/zoe/tools/types.js';
+ */
+
 const { quote: q, Fail } = assert;
 
 const trace = makeTracer('PA', false);
diff --git a/packages/zoe/src/contractSupport/priceAuthorityInitial.js b/packages/zoe/src/contractSupport/priceAuthorityInitial.js
index d6a8c02550aa..273d375729d4 100644
--- a/packages/zoe/src/contractSupport/priceAuthorityInitial.js
+++ b/packages/zoe/src/contractSupport/priceAuthorityInitial.js
@@ -11,6 +11,10 @@ import { AmountMath } from '@agoric/ertp';
 import { multiplyBy } from './ratio.js';
 import { mintQuote } from './priceAuthorityTransform.js';
 
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 /**
  * Override `makeQuoteNotifier`, `quoteGiven` to provide an initial price
  * in case one is not yet available from the source.
diff --git a/packages/zoe/src/contractSupport/priceAuthorityTransform.js b/packages/zoe/src/contractSupport/priceAuthorityTransform.js
index 1a1017493946..2744c5998763 100644
--- a/packages/zoe/src/contractSupport/priceAuthorityTransform.js
+++ b/packages/zoe/src/contractSupport/priceAuthorityTransform.js
@@ -4,7 +4,10 @@ import { Fail, assert } from '@agoric/assert';
 import { AmountMath } from '@agoric/ertp';
 import { makeNotifier } from '@agoric/notifier';
 
-/** @import {EOnly} from '@endo/eventual-send' */
+/**
+ * @import {EOnly} from '@endo/eventual-send';
+ * @import {MutableQuote, PriceAuthority, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
 
 /**
  * @param {Brand<'set'>} quoteBrand
diff --git a/packages/zoe/src/contractSupport/priceQuote.js b/packages/zoe/src/contractSupport/priceQuote.js
index 341712b43f57..ff8b22e4c6b3 100644
--- a/packages/zoe/src/contractSupport/priceQuote.js
+++ b/packages/zoe/src/contractSupport/priceQuote.js
@@ -4,6 +4,10 @@ import { AmountMath } from '@agoric/ertp';
 import { Nat } from '@endo/nat';
 import { E } from '@endo/eventual-send';
 
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 const { Fail } = assert;
 
 // PriceAuthorities return quotes as a pair of an amount and a payment, both
diff --git a/packages/zoe/src/contracts/callSpread/fundedCallSpread.js b/packages/zoe/src/contracts/callSpread/fundedCallSpread.js
index f0f7724afb01..f31827dec4f5 100644
--- a/packages/zoe/src/contracts/callSpread/fundedCallSpread.js
+++ b/packages/zoe/src/contracts/callSpread/fundedCallSpread.js
@@ -11,6 +11,10 @@ import {
 import { makePayoffHandler } from './payoffHandler.js';
 import { Position } from './position.js';
 
+/**
+ * @import {PriceAuthority} from '@agoric/zoe/tools/types.js';
+ */
+
 /**
  * This contract implements a fully collateralized call spread. This is a
  * combination of a call option bought at one strike price and a second call
diff --git a/packages/zoe/src/contracts/callSpread/pricedCallSpread.js b/packages/zoe/src/contracts/callSpread/pricedCallSpread.js
index 9d4da2aa3196..f4695017cccc 100644
--- a/packages/zoe/src/contracts/callSpread/pricedCallSpread.js
+++ b/packages/zoe/src/contracts/callSpread/pricedCallSpread.js
@@ -15,6 +15,10 @@ import {
 import { makePayoffHandler } from './payoffHandler.js';
 import { Position } from './position.js';
 
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 const { Fail } = assert;
 
 const PERCENT_BASE = 100n;
diff --git a/packages/zoe/src/contracts/loan/index.js b/packages/zoe/src/contracts/loan/index.js
index caa76ed5ee40..792a29094fce 100644
--- a/packages/zoe/src/contracts/loan/index.js
+++ b/packages/zoe/src/contracts/loan/index.js
@@ -6,6 +6,10 @@ import {
 } from '../../contractSupport/index.js';
 import { makeLendInvitation } from './lend.js';
 
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 /**
  * Add collateral of a particular brand and get a loan of another
  * brand. Collateral (also known as margin) must be greater than the
diff --git a/packages/zoe/src/contracts/loan/types.js b/packages/zoe/src/contracts/loan/types.js
index 3afe36113022..39fa1067fec1 100644
--- a/packages/zoe/src/contracts/loan/types.js
+++ b/packages/zoe/src/contracts/loan/types.js
@@ -24,7 +24,7 @@
  *
  * @property {AutoswapInstance} autoswapInstance
  *
- * @property {PriceAuthority} priceAuthority
+ * @property {import('../../../tools/types.js').PriceAuthority} priceAuthority
  *
  *   Used for getting the current value of collateral and setting
  *   liquidation triggers.
@@ -66,7 +66,7 @@
  *
  *   A function to get the current debt
  *
- * @property {PromiseRecord<PriceQuote>} liquidationPromiseKit
+ * @property {PromiseRecord<import('../../../tools/types.js').PriceQuote>} liquidationPromiseKit
  *
  *   PromiseKit that includes a promise that resolves to a PriceQuote
  *   when liquidation is triggered
@@ -80,7 +80,7 @@
  *   The ZCFSeat holding the collateral in escrow after the borrower
  *   escrows it
  *
- * @property {PromiseRecord<PriceQuote>} liquidationPromiseKit
+ * @property {PromiseRecord<import('../../../tools/types.js').PriceQuote>} liquidationPromiseKit
  *
  *   PromiseKit that includes a promise that resolves to a PriceQuote
  *   when liquidation is triggered
@@ -179,7 +179,7 @@
  * @property {PromiseRecord<any>} liquidationPromiseKit
  * @property {bigint} [mmr]
  * @property {Handle<'Instance'>} autoswapInstance
- * @property {PriceAuthority} priceAuthority
+ * @property {import('../../../tools/types.js').PriceAuthority} priceAuthority
  * @property {PeriodNotifier} periodNotifier
  * @property {bigint} interestRate
  * @property {import('@agoric/time').RelativeTime} interestPeriod
@@ -198,7 +198,7 @@
  *
  * Make an invitation to add collateral to protect against liquidation
  *
- * @property {() => Promise<PriceQuote>} getLiquidationPromise
+ * @property {() => Promise<import('../../../tools/types.js').PriceQuote>} getLiquidationPromise
  *
  * Get a promise for a priceQuote that will resolve if liquidation
  * occurs. The priceQuote is for the value of the collateral that
diff --git a/packages/zoe/src/contracts/priceAggregator.js b/packages/zoe/src/contracts/priceAggregator.js
index 857ba9352a8e..97bcff66f04f 100644
--- a/packages/zoe/src/contracts/priceAggregator.js
+++ b/packages/zoe/src/contracts/priceAggregator.js
@@ -13,7 +13,6 @@ import { E } from '@endo/eventual-send';
 import { Far } from '@endo/marshal';
 import { notForProductionUse } from '@agoric/internal/src/magic-cookie-test-only.js';
 
-import '../../tools/types-ambient.js';
 import {
   calculateMedian,
   makeOnewayPriceAuthorityKit,
@@ -33,6 +32,7 @@ import {
 
 /**
  * @import {LegacyMap} from '@agoric/store'
+ * @import {PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
  */
 /** @typedef {bigint | number | string} ParsableNumber */
 /**
diff --git a/packages/zoe/src/contracts/scaledPriceAuthority.js b/packages/zoe/src/contracts/scaledPriceAuthority.js
index 1e8507afa9f2..b558a315c165 100644
--- a/packages/zoe/src/contracts/scaledPriceAuthority.js
+++ b/packages/zoe/src/contracts/scaledPriceAuthority.js
@@ -9,6 +9,10 @@ import { makeInitialTransform } from '../contractSupport/priceAuthorityInitial.j
 import { makePriceAuthorityTransform } from '../contractSupport/priceAuthorityTransform.js';
 import { provideQuoteMint } from '../contractSupport/priceAuthorityQuoteMint.js';
 
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 /**
  * @typedef {object} ScaledPriceAuthorityOpts
  * @property {ERef<PriceAuthority>} sourcePriceAuthority
diff --git a/packages/zoe/test/unitTests/contracts/test-priceAggregator.js b/packages/zoe/test/unitTests/contracts/test-priceAggregator.js
index ad478c62660b..9ac5e8b75d9a 100644
--- a/packages/zoe/test/unitTests/contracts/test-priceAggregator.js
+++ b/packages/zoe/test/unitTests/contracts/test-priceAggregator.js
@@ -30,6 +30,10 @@ import {
   parseRatio,
 } from '../../../src/contractSupport/ratio.js';
 
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 /**
  * @callback MakeFakePriceOracle
  * @param {bigint} [valueOut]
diff --git a/packages/zoe/tools/fakePriceAuthority.js b/packages/zoe/tools/fakePriceAuthority.js
index 625f3cf5b2a0..7c93d869ce8a 100644
--- a/packages/zoe/tools/fakePriceAuthority.js
+++ b/packages/zoe/tools/fakePriceAuthority.js
@@ -10,7 +10,9 @@ import { TimeMath } from '@agoric/time';
 
 import { natSafeMath } from '../src/contractSupport/index.js';
 
-import './types-ambient.js';
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
 
 const { Fail } = assert;
 const { coerceRelativeTimeRecord } = TimeMath;
diff --git a/packages/zoe/tools/manualPriceAuthority.js b/packages/zoe/tools/manualPriceAuthority.js
index 93ffdc64e54a..856258cdb6a6 100644
--- a/packages/zoe/tools/manualPriceAuthority.js
+++ b/packages/zoe/tools/manualPriceAuthority.js
@@ -11,6 +11,10 @@ import {
   floorDivideBy,
 } from '../src/contractSupport/index.js';
 
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 /**
  * @param {object} options
  * @param {Brand<'nat'>} options.actualBrandIn
diff --git a/packages/zoe/tools/manualTimer.js b/packages/zoe/tools/manualTimer.js
index 622e2c6cd970..40717e0bcc91 100644
--- a/packages/zoe/tools/manualTimer.js
+++ b/packages/zoe/tools/manualTimer.js
@@ -3,7 +3,6 @@ import { bindAllMethods } from '@agoric/internal';
 import { buildManualTimer as build } from '@agoric/swingset-vat/tools/manual-timer.js';
 import { TimeMath } from '@agoric/time';
 
-import './types-ambient.js';
 import './internal-types.js';
 
 const { Fail } = assert;
diff --git a/packages/zoe/tools/scriptedPriceAuthority.js b/packages/zoe/tools/scriptedPriceAuthority.js
index 939ba641b8e9..14cc036d9835 100644
--- a/packages/zoe/tools/scriptedPriceAuthority.js
+++ b/packages/zoe/tools/scriptedPriceAuthority.js
@@ -9,6 +9,10 @@ import {
   makeOnewayPriceAuthorityKit,
 } from '../src/contractSupport/index.js';
 
+/**
+ * @import {PriceAuthority, PriceDescription, PriceQuote, PriceQuoteValue, PriceQuery,} from '@agoric/zoe/tools/types.js';
+ */
+
 export function makeScriptedPriceAuthority(options) {
   const {
     actualBrandIn,
diff --git a/packages/zoe/tools/types-ambient.js b/packages/zoe/tools/types.js
similarity index 99%
rename from packages/zoe/tools/types-ambient.js
rename to packages/zoe/tools/types.js
index 4c5cd6abcce1..13ee37f5de5f 100644
--- a/packages/zoe/tools/types-ambient.js
+++ b/packages/zoe/tools/types.js
@@ -1,4 +1,5 @@
-// @jessie-check
+// Ensure this is a module.
+export {};
 
 /**
  * @typedef {object} PriceQuote
diff --git a/packages/zoe/typedoc.json b/packages/zoe/typedoc.json
index bdab322c101c..f9eee1c3b4e4 100644
--- a/packages/zoe/typedoc.json
+++ b/packages/zoe/typedoc.json
@@ -12,7 +12,6 @@
         "src/zoeService/utils.d.ts",
         "src/zoeService/zoe.js",
         "tools/internal-types.js",
-        "tools/manualTimer.js",
-        "tools/types-ambient.js",
+        "tools/manualTimer.js"
     ]
 }