Critical gaps across all dimensions. 31 tools share identical minimal schemas (only session_id parameter, no type info). Descriptions are generic 1-2 sentence stubs (avg ~40 chars, well below 194-char baseline). No input parameter descriptions beyond session_id. No output schemas documented. No error handling guidance. Backwards-compatible aliases (16 tools) duplicate definitions without adding value. Tool names follow verb_noun convention (positive), but parameter schemas are completely absent, cannot verify LLM can construct valid calls.

• Add complete input schemas to all tools. For 'click': selector (string, required, description: 'CSS selector or XPath to element'), options (object, optional). For 'fill': selector, text (string, required), delay (number, optional, ms). For 'navigate_page': url (string, required, format: uri), waitUntil (enum: load|domcontentloaded|networkidle).
• Expand descriptions to 100-200 chars. Example: 'click' → 'Click an element matching the selector. Use wait_for() first if element may not exist yet. Returns success status and element details (tag, text, position).'
• Document output schemas. E.g., get_html returns {html: string, url: string, title: string}. list_pages returns {pages: [{id: string, url: string, title: string}], total: number}.
• Remove or consolidate backwards-compatible aliases. Keep primary names (navigate_page, click, fill) and deprecate chrome_* variants in a single migration notice. Reduces tool count from 31 to 15.
• Add error handling hints to descriptions. E.g., 'click' → 'If selector not found, returns error with available selectors. Try wait_for(selector) before clicking if timing is uncertain.'

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry