This is a test fixture server (fake-mcp-server.mjs) with 5 tools that have minimal real-world implementation. All tools have basic descriptions (10-50 chars) and parameter schemas, but lack depth, error handling guidance, and output documentation. Tool names follow verb_noun convention (read_file, write_file, search_notes, execute_command, create_schedule), which is positive. However, descriptions are generic and do not explain WHEN to use each tool, what it returns, or recovery paths. No parameter descriptions beyond the bare minimum. No output schemas documented. The execute_command tool is particularly risky, it accepts arbitrary shell commands with no validation, sanitization, or permission gating. This is a demonstration server, not production-grade.

• Document output schemas for all tools. Specify field names, types, and what data is returned. Example: read_file should return {content: string, size: number, encoding: string}.
• Expand tool descriptions to 100-200 characters. Include WHAT the tool does, WHEN to use it (vs. similar tools), and what it returns. Example: 'Read a file from disk and return its contents as a string. Use this to retrieve configuration files, logs, or data files. Returns file content, size, and encoding.'
• Add parameter descriptions explaining format, constraints, and valid ranges. Example: 'Filesystem path to read (absolute or relative; must exist; max 4096 chars).'
• Implement input validation and sanitization for execute_command. Reject commands containing dangerous patterns (rm -rf, >, |, etc.). Add a dry_run parameter and require explicit confirmation for destructive operations.
• Add error handling that returns actionable messages. Example: 'File not found at /path/to/file. Check the path and try again.' instead of a raw 404.