Server implements 5 CRUD tools with complete input schemas and basic descriptions. All tools have proper JSON Schema definitions with type constraints (minLength, maxLength, gt). Descriptions are present but minimal (10-40 chars), lacking context on WHEN to use each tool and what happens on error. No output schemas documented. Parameter descriptions exist but are generic ('User name', 'User ID'). Missing error recovery guidance and idempotency hints for destructive operations. Naming follows verb_noun convention correctly (create_user, get_user, etc.). No tool annotations (readOnlyHint, destructiveHint) despite clear risk stratification.

• Expand tool descriptions to 50-200 chars. Example: 'Create a new user with a unique email address. Returns the created user object with id, name, and email. Fails if email already exists, use get_user() to check first.'
• Document output schemas for all tools. Specify that create_user, get_user, update_user, delete_user return {id: int, name: string, email: string}; list_users returns {users: [{id, name, email}], total: int}.
• Add tool annotations to mcp.py tool registration. Mark delete_user with destructiveHint=true, create_user/update_user with idempotentHint=false (or true if idempotent), get_user/list_users with readOnlyHint=true.
• Enhance error messages with recovery guidance. E.g., HTTPException(status_code=404, detail='User not found. Call list_users() to see available users or search_users() with a partial name.') for get_user.
• Add pagination to list_users: accept limit (1-100, default 20) and offset parameters; return {users: [...], total: int, limit: int, offset: int} to enable agent-driven pagination.