File Access MCP provides 14 tools with complete input schemas and descriptions. Naming follows verb_noun convention (read_file, write_file, delete_file). Descriptions are present and adequate (avg ~100 chars), explaining what each tool does. However, descriptions lack actionable context for LLM selection, they don't explain WHEN to use each tool vs alternatives, or what prerequisites exist. Parameter descriptions are minimal (e.g., 'The file path to read' without format/constraint guidance). Output schemas are not documented, LLMs cannot predict what fields to expect from responses. Error handling is absent from tool definitions; no guidance on recovery paths. Security-critical tools (delete_file, write_file) lack permission gates or confirmation patterns. Composition is sound, each tool has one responsibility, but no batch variants for common loop patterns (e.g., delete multiple files in one call).

• Document output schemas for all tools. E.g., list_directory should specify: returns array of {name, path, type, size, modified}, total_count, next_cursor. LLMs need this to plan downstream calls.
• Add confirmation pattern to delete_file and write_file. Implement a dry_run parameter or require explicit confirmation before destructive operations. Prevents accidental data loss.
• Enhance parameter descriptions with constraints. E.g., 'path (string, 1-4096 chars, no null bytes, relative or absolute)' and 'head (number, 1-10000 lines)'. Enables LLM input validation.
• Add WHEN-to-use guidance to tool descriptions. E.g., 'Use read_file for text files <10MB; use read_binary_file for images, audio, video, or binary data.' Disambiguates tool selection.
• Define error responses with recovery hints. E.g., 'File not found: /path/to/file. Check path spelling or use search_files() to locate it.' Guides agent retry logic.