diff --git a/apps/sim/lib/selectors/server/providers/powerbi.test.ts b/apps/sim/lib/selectors/server/providers/powerbi.test.ts
index 2dd0c28cf8d..d42c9984652 100644
--- a/apps/sim/lib/selectors/server/providers/powerbi.test.ts
+++ b/apps/sim/lib/selectors/server/providers/powerbi.test.ts
@@ -136,7 +136,8 @@ describe('Power BI selector provider boundary', () => {
         manualWorkspaceId: 'stale-manual-workspace',
         [field]: workspace,
       }
-      const picker = PowerBIBlock.subBlocks.find((subBlock) => subBlock.id === 'datasetSelector')!
+      const picker = PowerBIBlock.subBlocks.find((subBlock) => subBlock.id === 'datasetSelector')
+      if (!picker) throw new Error('Power BI block has no datasetSelector')
       const context = buildSelectorContextFromValues({
         selectorKey: 'powerbi.datasets',
         contextConfigs: getSelectorContextSubBlocks(PowerBIBlock.subBlocks, values),
diff --git a/apps/sim/tools/powerbi/__fixtures__/provider-fixture.ts b/apps/sim/tools/powerbi/__fixtures__/provider-fixture.ts
index b777ffa0b49..f59f8bf3db2 100644
--- a/apps/sim/tools/powerbi/__fixtures__/provider-fixture.ts
+++ b/apps/sim/tools/powerbi/__fixtures__/provider-fixture.ts
@@ -31,7 +31,7 @@ export type PowerBIFixtureScenario =
   | 'missing-identity'
   | 'missing-query'
 
-export interface PowerBIFixtureRequest {
+interface PowerBIFixtureRequest {
   method: string
   path: string
   body: unknown
diff --git a/apps/sim/tools/powerbi/execute-query.test.ts b/apps/sim/tools/powerbi/execute-query.test.ts
index 8da6dcd256a..02da7fed282 100644
--- a/apps/sim/tools/powerbi/execute-query.test.ts
+++ b/apps/sim/tools/powerbi/execute-query.test.ts
@@ -2,6 +2,9 @@ import { jsonResponse } from '@sim/testing/helpers/http'
 import { describe, expect, it } from 'vitest'
 import { powerbiExecuteQueryTool } from '@/tools/powerbi/execute-query'
 
+const { transformResponse } = powerbiExecuteQueryTool
+if (!transformResponse) throw new Error('powerbi_execute_query has no transformResponse')
+
 const params = {
   accessToken: 'provider-token',
   groupId: 'workspace-id',
@@ -32,7 +35,7 @@ describe('Power BI DAX result handling', () => {
       ],
     })
 
-    const result = await powerbiExecuteQueryTool.transformResponse!(response, params)
+    const result = await transformResponse(response, params)
 
     expect(result).toMatchObject({
       success: false,
@@ -52,7 +55,7 @@ describe('Power BI DAX result handling', () => {
   })
 
   it('preserves provider column names, blank values and falsy values in complete results', async () => {
-    const result = await powerbiExecuteQueryTool.transformResponse!(
+    const result = await transformResponse(
       jsonResponse({
         results: [
           {
@@ -79,7 +82,7 @@ describe('Power BI DAX result handling', () => {
   })
 
   it('does not fabricate a query error message when Microsoft supplies only a code', async () => {
-    const result = await powerbiExecuteQueryTool.transformResponse!(
+    const result = await transformResponse(
       jsonResponse({ error: { code: 'DatasetExecuteQueriesError' } }),
       params
     )
@@ -98,7 +101,7 @@ describe('Power BI DAX result handling', () => {
   })
 
   it.each(['omitted', 'empty'])('accepts one result table with %s rows', async (kind) => {
-    const result = await powerbiExecuteQueryTool.transformResponse!(
+    const result = await transformResponse(
       jsonResponse({ results: [{ tables: [kind === 'empty' ? { rows: [] } : {}] }] }),
       params
     )
@@ -117,7 +120,7 @@ describe('Power BI DAX result handling', () => {
             { code: 'AnalysisServicesErrorCode', detail: { type: 1, value: '3238920194' } },
             { code: 'DetailsMessage', detail: { type: 1, value: 'The DAX query is invalid.' } },
           ]
-    const result = await powerbiExecuteQueryTool.transformResponse!(
+    const result = await transformResponse(
       jsonResponse({
         error: {
           code: 'DatasetExecuteQueriesError',
@@ -174,9 +177,7 @@ describe('Power BI DAX result handling', () => {
           : undefined
       )
 
-      await expect(powerbiExecuteQueryTool.transformResponse!(response, params)).rejects.toThrow(
-        /maximum size.*20971520/
-      )
+      await expect(transformResponse(response, params)).rejects.toThrow(/maximum size.*20971520/)
       expect(canceled).toBe(true)
     }
   )
@@ -191,7 +192,7 @@ describe('Power BI DAX result handling', () => {
         },
       })
     )
-    const transformed = powerbiExecuteQueryTool.transformResponse!(response, params, {
+    const transformed = transformResponse(response, params, {
       signal: abort.signal,
     })
     abort.abort(new Error('Execution canceled'))
diff --git a/apps/sim/tools/powerbi/types.ts b/apps/sim/tools/powerbi/types.ts
index 01a9c517cdc..cf586c585a0 100644
--- a/apps/sim/tools/powerbi/types.ts
+++ b/apps/sim/tools/powerbi/types.ts
@@ -1,6 +1,6 @@
 import type { OutputProperty, ToolResponse } from '@/tools/types'
 
-export interface PowerBIAuthParams {
+interface PowerBIAuthParams {
   accessToken: string
 }
 
@@ -27,7 +27,7 @@ export interface PowerBIExecuteQueryParams extends PowerBIDatasetParams {
   includeNulls?: boolean
 }
 
-export type PowerBINotifyOption = 'NoNotification' | 'MailOnFailure' | 'MailOnCompletion'
+type PowerBINotifyOption = 'NoNotification' | 'MailOnFailure' | 'MailOnCompletion'
 
 export interface PowerBIRefreshDatasetParams extends PowerBIDatasetParams {
   notifyOption?: PowerBINotifyOption
@@ -71,7 +71,7 @@ export interface PowerBIDataset {
   webUrl: string | null
 }
 
-export interface PowerBIRefreshAttempt {
+interface PowerBIRefreshAttempt {
   attemptId: number | null
   type: string | null
   startTime: string | null
@@ -96,7 +96,7 @@ export interface PowerBIQueryError {
   details: unknown | null
 }
 
-export interface PowerBIInformationProtectionLabel {
+interface PowerBIInformationProtectionLabel {
   id: string | null
   name: string | null
 }
@@ -206,21 +206,6 @@ export const POWERBI_DATASET_OUTPUT_PROPERTIES = {
   webUrl: { ...nullableString, description: 'Semantic model URL in Power BI, when available' },
 } satisfies Record<string, OutputProperty>
 
-export const POWERBI_REFRESH_ATTEMPT_OUTPUT_PROPERTIES = {
-  attemptId: {
-    type: 'number',
-    nullable: true,
-    description: 'Refresh attempt index',
-  },
-  type: { ...nullableString, description: 'Provider refresh attempt type' },
-  startTime: { ...nullableString, description: 'Attempt start timestamp' },
-  endTime: { ...nullableString, description: 'Attempt end timestamp, when available' },
-  serviceExceptionJson: {
-    ...nullableString,
-    description: 'Serialized provider failure details, when available',
-  },
-} satisfies Record<string, OutputProperty>
-
 export const POWERBI_REFRESH_OUTPUT_PROPERTIES = {
   requestId: { ...nullableString, description: 'Provider refresh request ID' },
   refreshType: { ...nullableString, description: 'Provider refresh trigger type' },
@@ -237,7 +222,23 @@ export const POWERBI_REFRESH_OUTPUT_PROPERTIES = {
   refreshAttempts: {
     type: 'array',
     description: 'Refresh attempts supplied by the provider',
-    items: { type: 'object', properties: POWERBI_REFRESH_ATTEMPT_OUTPUT_PROPERTIES },
+    items: {
+      type: 'object',
+      properties: {
+        attemptId: {
+          type: 'number',
+          nullable: true,
+          description: 'Refresh attempt index',
+        },
+        type: { ...nullableString, description: 'Provider refresh attempt type' },
+        startTime: { ...nullableString, description: 'Attempt start timestamp' },
+        endTime: { ...nullableString, description: 'Attempt end timestamp, when available' },
+        serviceExceptionJson: {
+          ...nullableString,
+          description: 'Serialized provider failure details, when available',
+        },
+      },
+    },
   },
 } satisfies Record<string, OutputProperty>
 
diff --git a/apps/sim/tools/powerbi/utils.ts b/apps/sim/tools/powerbi/utils.ts
index 6dc2b55e615..76076fd36d1 100644
--- a/apps/sim/tools/powerbi/utils.ts
+++ b/apps/sim/tools/powerbi/utils.ts
@@ -10,7 +10,7 @@ import type {
 } from '@/tools/powerbi/types'
 import { safeUrlPathSegment } from '@/tools/url-path'
 
-export const MAX_POWERBI_RESPONSE_BYTES = 20 * 1024 * 1024
+const MAX_POWERBI_RESPONSE_BYTES = 20 * 1024 * 1024
 
 export const POWERBI_ACCESS_TOKEN_PARAM = {
   type: 'string',