40 tools with consistent naming (verb_noun pattern) and present descriptions, but critical gaps in schema completeness and parameter documentation. Most tools lack explicit input schema definitions in visible source code, schemas are inferred from parameter lists rather than formally declared. Descriptions average ~80 chars (below 194-char baseline), many under 100 chars. No output schemas documented. Error handling absent. Security concerns: browser_launch accepts headless/fresh_profile booleans with no validation guidance; evaluate executes arbitrary JS with no sandboxing warning. Composition is reasonable (single responsibility per tool), but parameter descriptions lack format/constraint details (e.g., 'URL to navigate to' vs 'URL (http/https, max 2048 chars)').

• Document output schemas for all tools. For browser_snapshot, specify: {elements: [{ref: string, role: string, text: string, ...}], total: number}. For extract_table, specify: {rows: [{cells: string[]}], headers: string[]}.
• Add format constraints to parameter descriptions. E.g., navigate(url): 'URL to navigate to (http/https, max 2048 chars)'. fill(value): 'Text to fill (max 10000 chars, no control characters)'.
• Add security warnings to evaluate: 'Executes arbitrary JavaScript in page context. Do NOT pass untrusted code. Validate all expressions before execution.'
• Implement error recovery hints. E.g., click(ref): 'If element not found, call browser_snapshot() first to get current element references.'
• Add confirmation step for destructive tools. E.g., reset_profile should return {status: 'confirm_required', message: 'This will delete all browser data. Call reset_profile(confirm=true) to proceed.'}.