Install

1. If you want exact Node.js version, install one in .nvmrc (if you have nvm, use nvm install). Should not matter for the bug
2. If you want to use exact NPM version, use corepack enable. Should not matter for the bug
3. Install exact package versions: npm ci

Reproduce bug

npx tsc

Expected output: successful compilation

Actual output:

node_modules/@azure/functions/src/utils/toolProperties.ts:10:1 - error TS1287: A top-level 'export' modifier cannot be used on value declarations in a CommonJS module when 'verbatimModuleSyntax' is enabled.

10 export class ToolPropertyBuilder implements McpToolProperty {
   ~~~~~~

node_modules/@azure/functions/src/utils/toolProperties.ts:162:1 - error TS1287: A top-level 'export' modifier cannot be used on value declarations in a CommonJS module when 'verbatimModuleSyntax' is enabled.

162 export const arg = {
    ~~~~~~

node_modules/@azure/functions/src/utils/toolProperties.ts:225:1 - error TS1287: A top-level 'export' modifier cannot be used on value declarations in a CommonJS module when 'verbatimModuleSyntax' is enabled.

225 export function convertToolProperties(args: Args): McpToolProperty[] {
    ~~~~~~

node_modules/@azure/functions/src/utils/toolProperties.ts:238:1 - error TS1287: A top-level 'export' modifier cannot be used on value declarations in a CommonJS module when 'verbatimModuleSyntax' is enabled.

238 export function isToolProperties(properties: unknown): properties is Args {
    ~~~~~~

node_modules/@azure/functions/src/utils/toolProperties.ts:275:1 - error TS1287: A top-level 'export' modifier cannot be used on value declarations in a CommonJS module when 'verbatimModuleSyntax' is enabled.

275 export function normalizeToolProperties(
    ~~~~~~


Found 5 errors in the same file, starting at: node_modules/@azure/functions/src/utils/toolProperties.ts:10