MetaWebMCP exhibits severe definition quality gaps across all 8 tools. Most critically: 6 of 8 tools (browser_type, browser_click, browser_select_option, browser_wait_for, browser_close, browser_take_screenshot) have NO visible input schemas in the provided source code, only empty Input: {} entries. Only browser_navigate has a documented parameter (url). No tool descriptions explain state mutations, error recovery, or dependencies. Tool composition is poor: browser_click, browser_type, and browser_select_option are separate tools that agents must chain manually, yet no tool returns the IDs or selectors needed for the next call. Error handling is absent, no guidance on what to do if a click fails or a selector is invalid.

• Add complete JSON Schema input definitions for all 8 tools. For browser_click, define selector (string, required, description: 'CSS selector or XPath to target element'), action (enum: click|double_click|right_click), and timeout (integer, 1-30000 ms). Validate against JSON Schema spec.
• Expand tool descriptions to 100-200 chars following LLM-optimized pattern: 'Click an element in the browser by CSS selector or XPath. Use after browser_snapshot to identify selectors. Returns success/failure and any resulting page changes. Fails if selector not found or element not clickable.'
• Add parameter descriptions for all inputs. E.g., for browser_type: 'text (string, required): Text to type into the focused element. Max 10000 chars. selector (string, optional): CSS selector to focus before typing. If omitted, types into currently focused element.'
• Implement error recovery guidance in descriptions. E.g., browser_click: 'If selector not found, call browser_snapshot to re-examine page structure and try a different selector. If element not clickable, it may be hidden or disabled, check visibility in snapshot.'
• Return structured output from interaction tools. browser_click should return {success: boolean, selector_matched: boolean, element_text?: string, page_title?: string, error?: string} so agents can chain calls without re-querying browser_snapshot.