Single tool with critical definition gaps. Tool name 'format_markdown' lacks action clarity (format is vague, does it parse, convert, validate, or transform?). Description is adequate (58 chars) but generic. Input schema present with basic type info but parameter description is minimal. Output schema completely undocumented, LLM cannot predict return structure. No error handling guidance. Implementation contains hardcoded return value ('hello world') that ignores actual formatting logic, indicating incomplete/broken tool. Per-tool score: 28/100.

• Rename tool to 'convert_text_to_markdown' or 'apply_markdown_formatting' to clarify intent and match verb_noun baseline (90% of A+ tools start with action verb).
• Document output schema: 'Returns: string (markdown-formatted text with applied syntax for headings, bold text, italics, and code blocks).'
• Expand parameter description: 'text (string, max 10000 chars, UTF-8): Plain text to convert. Supports newline-delimited lines. Indented lines (4+ spaces or tabs) become code blocks; lines ending with ':' or starting with 'Section'/'Chapter' become headings; ALL-CAPS words become bold; quoted text becomes italics.'
• Fix implementation: remove hardcoded 'hello world' return and restore actual markdown formatting logic.
• Add error handling: validate input length, return actionable errors (e.g., 'Input exceeds 10000 char limit'), and document expected behavior for edge cases (empty input, single line, no formatting triggers).