Sentinel exposes 5 tools with basic schemas and descriptions, but falls short of production quality. Tool names are action-oriented (web_fetch, send_email, get_customer_record, delete_record, ping), which is good. However, descriptions are minimal (10-50 chars), parameter descriptions are sparse or missing, and output schemas are not documented. The ping tool is a protocol anti-pattern (removed in MCP 2026-07-28). Error handling is absent, no recovery guidance, no categorization. Security concerns: delete_record lacks permission gates despite being marked DESTRUCTIVE. No tool annotations (readOnlyHint, destructiveHint) despite risk labels in metadata. Schemas are present but incomplete, parameters lack detailed constraints, ranges, or format guidance.

• Expand tool descriptions to 100-200 chars. Include WHAT the tool does, WHEN to use it, and what it returns. E.g., 'Fetch a web page and return its HTML content. Use this to retrieve current information from URLs. Returns {content: string, status_code: int, headers: dict}.'
• Document output schemas for all tools. Define the structure, field types, and meanings. E.g., get_customer_record returns {id: int, name: string, email: string, created_at: ISO8601}.
• Add tool annotations to schema definitions: readOnlyHint=true for web_fetch/get_customer_record, destructiveHint=true for delete_record, idempotentHint=true for ping (if kept).
• Implement permission gates for delete_record. Verify caller authority before executing. Return 'Permission denied: user lacks delete:record scope' if unauthorized.
• Remove the ping tool. It is a protocol anti-pattern and provides no value to agents. Use health checks at the transport layer instead.