Host402 provides 4 tools with complete input schemas and descriptions. Naming follows verb_noun convention (deploy_*, get_*, list_*). Descriptions are adequate (100-200 chars) but lack actionable recovery guidance for payment-related errors. Schemas are well-structured with proper types and enums. However, output schemas are not documented, LLMs cannot predict response structure for chaining. Payment flow (402 challenge → signature → retry) is implicit and not formalized as a Multi-Round-Trip Request pattern. Error handling returns JSON but lacks categorization (retryable vs fatal). No tool annotations (readOnlyHint/destructiveHint) despite clear risk levels.

• Document output schemas for all 4 tools. Include field names, types, and required fields. E.g., host402_deploy_website returns {deployment_id, site_url, expires_at, status}.
• Formalize payment flow as Multi-Round-Trip Request: first call returns result.input_required with x402_requirement; agent signs and retries with payment_signature. Use structured result type, not JSON text.
• Add tool annotations: host402_deploy_website and host402_deploy_monetized_api should have destructiveHint=true. host402_get_site_info and host402_list_bazaar_services should have readOnlyHint=true.
• Enhance error responses with error.code and error.category (e.g., 'payment_verification_failed', category='user_fixable'). Include recovery hint: 'Invalid signature. Ensure wallet has sufficient USDC balance on Base.'
• Add pagination to host402_list_bazaar_services: accept limit (1-100, default 20) and offset/next_cursor. Return total_count and next_cursor in response.