util_x402_refund_amount_check
X402 Refund Amount Check compares requested refund raw amount with original settled amount from bounded caller-supplied values without an external provider. Call X402 Refund Amount Check before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result m...
This record as markdown: /tools/io-github-davidmosiah-delx-protocol/util-x402-refund-amount-check.md
What util_x402_refund_amount_check does on Delx Protocol — Agent Recovery & Continuity
AI agents call util_x402_refund_amount_check to retrieve information from Delx Protocol — Agent Recovery & Continuity without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
settled_raw | string | Yes | Settled Raw supplied to X402 Refund Amount Check; used only for this bounded calculation and processed in memory without retention. |
requested_raw | string | Yes | Requested Raw supplied to X402 Refund Amount Check; used only for this bounded calculation and processed in memory without retention. |
Parameters from the server's own tool schema.
Why util_x402_refund_amount_check is rated Low
Even though util_x402_refund_amount_check only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs util_x402_refund_amount_check safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Delx Protocol — Agent Recovery & Continuity, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For util_x402_refund_amount_check, this is the rule to start with:
util_x402_refund_amount_check is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Delx Protocol — Agent Recovery & Continuity, apply this rule, and every util_x402_refund_amount_check call is checked against it from then on.
Questions about util_x402_refund_amount_check
X402 Refund Amount Check compares requested refund raw amount with original settled amount from bounded caller-supplied values without an external provider. Call X402 Refund Amount Check before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for X402 Refund Amount Check as versioned deterministic JSON. Limitation: Validates metadata only; it never settles payment, signs payloads, contacts a facilitator, refunds funds, or asserts on-chain truth. It is categorised as a Read tool in the Delx Protocol — Agent Recovery & Continuity MCP Server, which means it retrieves data without modifying state.
util_x402_refund_amount_check accepts 2 parameters: settled_raw, requested_raw. Required: settled_raw, requested_raw. The full parameter table on this page comes from the server's own tool schema.
Register the Delx Protocol — Agent Recovery & Continuity MCP server in PolicyLayer and add a rule for util_x402_refund_amount_check: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Delx Protocol — Agent Recovery & Continuity. Nothing to install.
util_x402_refund_amount_check is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the util_x402_refund_amount_check rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for util_x402_refund_amount_check. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
util_x402_refund_amount_check is provided by the Delx Protocol — Agent Recovery & Continuity MCP server (https://api.delx.ai/v1/mcp?src=registry). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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