Server has 7 tools with mostly complete schemas and descriptions. Naming follows verb_noun convention (app_start, app_stop, clipboard_get). Descriptions are present and contextual (avg ~120 chars), exceeding the 10-char minimum but below the 194-char production baseline. Input schemas use Zod with type definitions and descriptions. However, output schemas are defined in code but not formally exposed in tool registration (only visible in return statements). Error handling returns structured JSON with error flags and messages, but lacks recovery guidance (e.g., 'try search_users first'). Tool composition is sound, each tool has one responsibility. Parameter descriptions are adequate but some lack format constraints (e.g., 'serial' accepts any string without validation hints). No pagination support for list_apps despite potentially large result sets.

• Expose output schemas in tool registration via the MCP SDK. Ensure clients receive structured return type definitions so they can plan downstream tool calls.
• Add pagination to app_list: introduce 'limit' (default 20, max 100) and 'offset' parameters, return 'total_count' and 'has_more' fields to enable iteration over large package lists.
• Enhance error messages with actionable recovery steps. E.g., 'Invalid package name: xyz. Try app_list to find valid packages, or use format: com.example.app'.
• Add format constraints to parameter descriptions. E.g., 'serial: Device serial number (alphanumeric, 1-32 chars; obtain via adb devices)'.
• Implement dry-run or confirmation for app_uninstall. Add optional 'confirm' boolean parameter or return a confirmation token requiring a second call to execute.