Before You File a Bug Report Please Confirm You Have Done The Following...

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
• I have searched for related issues and found none that matched my issue.
• I have read the FAQ and my problem is not listed.

Playground Link

https://typescript-eslint.io/play/#ts=5.7.2&fileType=.tsx&code=PTAEFEA8AcFMGMAusAmpYCcMHsMBpQBzbRUbAO1gDpRBQcgCgBlRDAS3MIAoBvAXwEoA3PXooEAGwCGGWKHgUAzqUgAuUAFdyAa3LYA7uWEgIMBMjSYc%2BIiVC7KNQDLkTFuy6Qh9IA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6Jge1oCMBDZRLXxdk%2BKkwDm6MACZwYAL4gFQA&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA&tokens=false

Repro Code

// Expected error, got one. ✅
String({});

declare const x: unknown;
// Expected error, got none. ❌
String(x);

ESLint Config

module.exports = {
  parser: "@typescript-eslint/parser",
  rules: {
    "@typescript-eslint/no-base-to-string": 2,
  },
};

tsconfig

Expected Result

Expected error.

Actual Result

No error.

Additional Info

No response