Refunds. Enterprise plan refunds require prior written approval by Customer's account administrator and must be submitted within sixty (60) days... Chargebacks and Adjustments. Provider may issue credits in lieu of refunds as mutually agreed in writing... Standard refunds are available within 30 days of purchase for all standard plan subscriptions; enterprise terms may supersede... Key insight: Multiple chunks from same source = use load_pages() instead of fragments. Decision framework: Same source clustering → load full pages; Multiple sources → targeted follow-up searches. Tool usage guidance: When writing tool descriptions, think like you're training a new team member. Make implicit knowledge explicit—specialized query formats, terminology definitions, and relationships between resources. Ambiguous parameter names like "user" should become "user_id" for clarity. Error handling strategy: If tool calls fail validation, return actionable error messages that guide agents toward correct usage rather than cryptic error codes. For example: "Date filter requires YYYY-MM-DD format, received '2024/03/15'" instead of "ValueError: invalid date format".