mcp-testrail

The project uses environment variables (TESTRAIL_URL, TESTRAIL_USERNAME, TESTRAIL_API_KEY) for sensitive credentials, which is good practice. Input validation is robust, leveraging Zod schemas to define and parse expected data, mitigating many common injection vulnerabilities. Error responses returned to clients are generic, preventing direct leakage of internal server errors. A minor point is that `handleApiError` logs raw `responseData` to `console.error`, which could expose sensitive information in server logs if not properly secured, but this data is not directly returned to the client.