Server has 19 tools with complete input schemas and descriptions. Naming follows verb_noun convention (list_, get_, create_, delete_, etc.). Descriptions are present and adequate (avg ~100 chars), but lack LLM-optimized guidance on WHEN to use each tool vs. similar ones. Parameters are well-typed with enums for sort_by/sort_direction/filetype. Critical gap: no output schemas documented, LLMs cannot infer what fields to expect from responses. Error handling is minimal; no recovery guidance. Security: credentials injected via environment variables (good), but no permission gates on destructive tools (delete, delete_download). Composition is sound, tools are single-responsibility and chainable.

• Document output schemas for all tools. Example: 'list_files returns {files: [{name, size, owner, type, mtime}], total_count, has_more}'. This enables LLMs to plan downstream calls.
• Add confirmation/dry-run support to delete and delete_download. Implement a 'confirm_delete' parameter or a separate 'preview_delete' tool to prevent accidental data loss.
• Enhance error messages with recovery guidance. Instead of 'Connection failed', return 'Connection failed: check SYNOLOGY_HOST and credentials. Retry with updated env vars.'
• Clarify tool selection in descriptions. Add 'Use list_shares to see top-level folders; use list_files to browse within a folder.' This disambiguates similar tools.
• Return total_count and has_more in paginated responses so LLMs know when to fetch the next page.