[RECURRING] Create a recurring escrow subscription — automated billing on interval. Sets up a subscription that auto-creates escrow cycles at the specified interval. Supports fiat (MXN SPEI, USD wire) and web3 (USDC, USDT, MXNB on-chain) payment methods. MODES: - delegated=true: Platform charges ...
Risk signalsHandles credentials or secrets (token) · High parameter count (13 properties)
Part of the Kustodia Escrow server.
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AI agents use create_recurring_escrow to create or modify resources in Kustodia Escrow. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call create_recurring_escrow repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Kustodia Escrow.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"create_recurring_escrow": {
"limits": [
{
"counter": "create_recurring_escrow_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Kustodia Escrow policy for all 36 tools.
These attack patterns abuse exactly the kind of access create_recurring_escrow gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
[RECURRING] Create a recurring escrow subscription — automated billing on interval. Sets up a subscription that auto-creates escrow cycles at the specified interval. Supports fiat (MXN SPEI, USD wire) and web3 (USDC, USDT, MXNB on-chain) payment methods. MODES: - delegated=true: Platform charges automatically (requires spending cap) - delegated=false: Each cycle needs payer approval within 48h MONETIZATION: - Setup fee: 1% of first cycle - Per-cycle fee: 0.5% of each payment - Platform commission: 2% on release. It is categorised as a Write tool in the Kustodia Escrow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Kustodia Escrow MCP server in PolicyLayer and add a rule for create_recurring_escrow: 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.
create_recurring_escrow is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_recurring_escrow 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 create_recurring_escrow. 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.
create_recurring_escrow 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.
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