[FIAT ESCROW] Cancel a pending fiat payment before deposit. Cannot cancel web3 escrows this way.
Part of the Kustodia Escrow server.
Free to start. No card required.
AI agents may call cancel_payment to permanently remove or destroy resources in Kustodia Escrow. Without a policy, an autonomous agent could delete critical data in a loop with no way to undo the damage. PolicyLayer blocks destructive tools by default and requires explicit human approval before enabling them.
Without a policy, an AI agent could call cancel_payment in a loop, permanently destroying resources in Kustodia Escrow. There is no undo for destructive operations. PolicyLayer blocks this tool by default and only allows it when a human explicitly approves the action.
Destructive tools permanently remove data. Block by default. Only enable with explicit approval workflows.
{
"version": "1",
"default": "deny",
"hide": [
"cancel_payment"
]
}See the full Kustodia Escrow policy for all 36 tools.
These attack patterns abuse exactly the kind of access cancel_payment gives an agent. Each links to the full case and the policy that stops it:
Other destructive tools across the catalogue. The same approach applies to each: deny by default, or require human approval.
[FIAT ESCROW] Cancel a pending fiat payment before deposit. Cannot cancel web3 escrows this way.. It is categorised as a Destructive tool in the Kustodia Escrow MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Kustodia Escrow MCP server in PolicyLayer and add a rule for cancel_payment: 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 Kustodia Escrow. Nothing to install.
cancel_payment 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 cancel_payment 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 cancel_payment. 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.
cancel_payment is provided by the Kustodia Escrow MCP server (kustodia/escrow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 36 Kustodia Escrow tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.