ASCII Banner has clear tool naming and reasonably complete schemas, but lacks structured output documentation and error recovery guidance. Both tools follow verb_noun conventions and include descriptions, but the descriptions are somewhat generic and lack specific guidance on when to use each tool vs. alternatives. Parameters are documented with types but lack constraint information (e.g., max text length, valid font names as enum). Error handling returns plain strings rather than structured responses with recovery hints. The server is functional for its narrow domain but misses several quality patterns.

• Document output schemas explicitly. For get_fonts(), return {"fonts": ["standard", "slant", ...], "count": 123}. For generate_banner(), return {"banner": "<multi-line ascii art>", "font": "standard", "text": "input"}.
• Replace unstructured error strings with structured error objects: {"error": "font_not_found", "code": "E_FONT_INVALID", "message": "Font 'xyz' not found.", "recovery": "Call get_fonts() to list available fonts."}
• Convert font parameter to enum by fetching available fonts at startup and declaring them in the schema, or add a regex pattern constraint with description: 'Font name (2-30 chars, lowercase/digits/underscore/dash only).'
• Add text parameter constraints: {"type": "string", "minLength": 1, "maxLength": 500, "description": "Text to render as ASCII art (1-500 chars)."}
• Enhance get_fonts() description: 'List all available pyfiglet fonts. Call this first to discover which fonts (e.g., slant, standard, block) can be used with generate_banner().'
• Add idempotency note: Both tools are read-only and fully idempotent, safe to retry without side effects. Mark with idempotentHint if adopting tool annotations.