Mnemo has 12 tools with basic verb-noun naming (gtf_*), but critical gaps undermine quality. All tools have descriptions (10-100 chars, mostly adequate), but input schemas are present yet minimal. Most parameters lack type constraints and detailed descriptions. No output schemas documented. Error handling is absent, tools return raw exceptions rather than actionable recovery guidance. No parameter validation, no enum constraints, no pagination support. The server exposes file paths and LLM provider selection as parameters, creating security and usability risks. Tool composition is reasonable (each does one thing), but lack of structured output and error guidance makes this unsuitable for production agent use.

• Add structured output schemas to all tools. Document return types, field names, and types. E.g., gtf_list should return {files: [{path: string, mtime: number, title?: string}], total: number}.
• Move LLM provider/model selection to server-side configuration (environment variables or config file). Remove 'provider' and 'model' parameters from gtf_enrich and gtf_index. Inject credentials securely.
• Implement error handling: catch exceptions, return {error: string, code: string, recovery_hint: string}. E.g., 'File not found at /path/to/file.yaml. Verify the path exists and is readable. Call gtf_list() to see available files.'
• Add parameter validation and constraints. Use enums for 'provider' (if kept), add regex/length limits to 'path', document 'failure_ids' format (e.g., 'F001', 'F002'). Return validation errors with the invalid value and allowed options.
• Add confirmation step for destructive operations. gtf_delete should return {status: 'confirm_required', message: 'Delete GTF file at /path/to/file.yaml? This cannot be undone.', file_path: string}. Require a separate confirm_delete tool or a confirmation parameter.