This is a Next.js/Sanity ecommerce demo, not a standalone MCP server. Only 2 tools are defined in client-tools.ts. Both have descriptions and basic schemas, but lack depth. get_page_context has an empty input schema ({}), violating the schema requirement. set_product_filters has a reasonable schema with enums and descriptions, but the overall tool set is minimal and the codebase shows this is a reference implementation, not a production MCP server. No error handling guidance, no output schemas documented, no tool annotations. The descriptions are adequate (50-100 chars) but lack the LLM-optimization and dependency hints expected of production tools.

• Add output schema documentation for get_page_context. Specify what fields are returned (e.g., page_title, page_content, current_url) so the LLM knows what data is available.
• Add output schema documentation for set_product_filters. Specify the response structure (e.g., success boolean, redirect_url, applied_filters object) so the LLM can verify the action completed.
• Either expose groq_query as a tool or remove the reference from set_product_filters description. If groq_query is internal, rewrite the description to not mention it.
• Add error handling guidance to set_product_filters: 'If category not found, call list_categories() first. If no products match, suggest related categories or remove filters.'
• Add tool annotations: mark get_page_context with readOnlyHint=true; mark set_product_filters with destructiveHint=true (modifies browser state) and idempotentHint=false (repeated calls may have different effects).