AI agents call ebay_cancel_package to permanently remove resources in Ebay — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Package cancellation is a destructive action that cannot be easily reversed and has significant business and customer impact. Once cancelled, the package shipment state is permanently altered, potentially affecting inventory, customer satisfaction, and financial reconciliation. This is more severe than a simple Write operation because the action is not reversible without substantial manual intervention.
From the tool's definition Cancel a package by ID — this operation irreversibly cancels a shipment/package, preventing delivery and undoing the fulfillment workflow
Documented attack patterns abuse exactly the kind of access ebay_cancel_package 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_cancel_package:
{
"version": "1",
"default": "deny",
"hide": [
"ebay_cancel_package"
]
}ebay_cancel_package disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
Free to start. No card required.
Cancel a package by ID. It is categorised as a Destructive tool in the Ebay MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Ebay MCP server in PolicyLayer and add a rule for ebay_cancel_package: 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_cancel_package is a Destructive 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_cancel_package 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_cancel_package. 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_cancel_package 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.