This HITL server presents a well-structured interaction toolkit with clear naming conventions and decent parameter schemas. All 6 tools follow a consistent verb_noun pattern (hitl_ask, hitl_choose, hitl_collect, hitl_confirm, hitl_notify, hitl_poll) that clearly signals their intent. Input schemas are present and properly typed for all tools. Descriptions are present for all tools and most parameters. However, there are meaningful gaps: (1) output schemas are completely undocumented, callers cannot predict return structure; (2) several parameter descriptions are minimal or generic ('Optional project identifier for session tracking' lacks detail on what tracking means or how project_id affects behavior); (3) no error handling guidance documented, what happens on timeout, invalid input, or user cancel?; (4) hitl_poll's single parameter lacks sufficient context about request_id origin and validity window. The server demonstrates solid fundamentals but lacks the production-grade polish of A-tier tools.

• Add output schema documentation to all 6 tools. For hitl_ask, document: '{"response": string, "request_id": string, "session_id": string}'. For hitl_choose, include: '{"selected_index": number, "selected_value": string, "request_id": string}'. For hitl_collect, define: '{"form_data": {[key: string]: any}, "request_id": string}'.
• Expand project_id parameter description: 'Optional project identifier for organizing and filtering responses by project context. If provided, responses are tagged with this ID for session replay and audit trails. If omitted, defaults to 'default-project'.'
• For hitl_ask and hitl_choose, clarify timeout behavior: 'If max_wait_minutes expires without user response, the tool raises a TimeoutError with message "User did not respond within N minutes". Agents should handle this by prompting the user, offering alternatives, or escalating.'
• Enhance hitl_collect fields parameter: 'Array of field objects, each with: {"name": string (required, alphanumeric), "type": "text"|"number"|"email"|"select"|"checkbox" (required), "label": string (display name), "required": boolean, "validation": string (regex pattern or constraint description), "options": array<string> (for select/checkbox only)}. Example: [{"name": "email", "type": "email", "label": "Your email", "required": true}]'.
• Document hitl_poll return values: 'Returns {"status": "pending"|"completed"|"timeout"|"cancelled", "result": object|null, "error": string|null}. Use status field to determine agent next action: if pending, retry later; if completed, extract result; if timeout/cancelled, escalate or reprompt.'