Issue a full or partial refund for an eBay order. Use this to refund buyers for orders, including specifying the refund amount and reason.\n\nRequired OAuth Scope: sell.fulfillment\nMinimum Scope: https://api.ebay.com/oauth/api_scope/sell.fulfillment
AI agents use ebay_issue_refund to commit financial operations through Ebay — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool directly transfers money from a merchant's eBay account to a buyer, making it a financial operation. The ability to issue refunds of arbitrary amounts constitutes a direct financial commitment with real monetary consequences. This is the highest severity category due to the irreversible nature of fund transfers and the potential for significant financial loss if misused by an AI agent.
From the tool's definition Tool name is 'ebay_issue_refund' and description states 'Issue a full or partial refund for an eBay order' with ability to 'refund buyers for orders, including specifying the refund amount.' This directly moves money (refund payments) and commits financial…
Documented attack patterns abuse exactly the kind of access ebay_issue_refund gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ebay, and nothing reaches the server without passing your rules. This is the rule we recommend for ebay_issue_refund:
{
"version": "1",
"default": "deny",
"tools": {
"ebay_issue_refund": {
"deny_if": [
{
"conditions": [],
"on_deny": "Requires human approval."
}
]
}
}
}Any call to ebay_issue_refund is blocked until a human approves it. The rest of the server keeps working.
Free to start. No card required.
Issue a full or partial refund for an eBay order. Use this to refund buyers for orders, including specifying the refund amount and reason.\n\nRequired OAuth Scope: sell.fulfillment\nMinimum Scope: https://api.ebay.com/oauth/api_scope/sell.fulfillment. It is categorised as a Financial tool in the Ebay MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Ebay MCP server in PolicyLayer and add a rule for ebay_issue_refund: 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 Ebay. Nothing to install.
ebay_issue_refund is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the ebay_issue_refund 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 ebay_issue_refund. 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.
ebay_issue_refund is provided by the Ebay MCP server (yosefhayim/ebay-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 332 Ebay tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
332 Ebay tools catalogued and risk-classified — across an index of 42,500+ MCP servers.