This MCP server demonstrates solid definition quality across 38 tools with consistent naming conventions, structured schemas, and descriptions. All tools follow verb_noun naming (add-domain, delete-domain, list-domain, etc.) and use a centralized Schema helper for parameter definitions. Input schemas are present and typed for all tools. However, there are gaps: descriptions are brief (7-50 chars for most tools, below the 50-200 char LLM-optimized baseline), parameter descriptions lack detail about formats/constraints, and output schemas are undocumented. Error handling and recovery guidance are absent from descriptions. The server shows strong infrastructure (OpenTelemetry, proper logging, TypeScript/Zod validation) but could improve prompt-engineering for LLM selection and parameter validation messaging.

• Expand all tool descriptions to 50-200 characters with explicit WHAT/WHEN/WHY guidance. Example: 'Add Domain on upsun project' → 'Add a custom domain to your project. Call this to set up a user-owned domain (e.g., example.com) and trigger automatic DNS validation and HTTPS certificate provisioning. Requires project_id and domain_name (FQDN format).'
• Document output schemas for every tool. Add a 'Returns' field to each description or a separate schema document. Example: 'Returns {domain_id, domain_name, status, ssl_status, created_at}' so LLMs know what fields are available for downstream calls.
• Add format constraints to parameter descriptions. Example: 'domain_name (required): FQDN (e.g., example.com, api.example.com). Must be a valid domain, not IP address, and not exceed 255 chars.'
• Add explicit recovery guidance to destructive tool descriptions. Example for delete-domain: 'WARNING: Removes the domain permanently. Any HTTPS certificate for this domain will be deleted. This action is irreversible. Call list-domain first to confirm the domain exists.'
• Document pagination behavior in list tool descriptions. Example: 'Returns up to 100 domains per page. Results are paginated; use list-organization description model: pass `links.next.href` as `page_link` to fetch next page.'
• Add examples of when to use similar tools to disambiguate. Example for get-domain vs list-domain: 'Use this to fetch a single domain by name. If you need all domains for a project, use list-domain instead.'
• Include dependency hints in descriptions where relevant. Example for restore-backup: 'Restores data from a backup. First call list-backup to find available backup_id, then call restore-backup with the backup_id and target environment.'