7 tools. 4 can modify or destroy data without limits.
3 destructive tools with no built-in limits. Policy required.
Last updated:
Community server · catalogue entry verified 03/07/2026
Running more than one server? Check your whole stack →
4 of Green Helix's 7 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.
PolicyLayer is an MCP gateway — it sits between your AI agents and Green Helix, and nothing reaches the server without passing your rules. These are the rules we recommend:
{
"create_payment_intent": {
"deny_if": [
{
"conditions": [],
"on_deny": "Requires human approval."
}
]
}
} Financial tools should be explicitly enabled per use case, not open by default.
{
"create_customer": {
"limits": [
{
"counter": "create_customer_per_hour",
"window": "hour",
"max": 30,
"scope": "grant"
}
]
}
} Prevents bulk unintended modifications from agents caught in loops.
{
"get_balance": {
"limits": [
{
"counter": "get_balance_per_minute",
"window": "minute",
"max": 60,
"scope": "grant"
}
]
}
} Controls API costs and prevents retry loops from exhausting upstream rate limits.
Instant setup, no code required.
Other MCP servers with similar tools — same risk classification, starter policies for each.
Yes. The Green Helix server exposes 3 financial tools including create_payment_intent, create_refund, create_subscription. Without a policy, an autonomous agent can call these with no spend caps, no rate limits, and no approval flow. PolicyLayer lets you block financial tools by default, require human approval, or set per-tool rate limits — enforced on every call.
The Green Helix server has 1 write tools including create_customer. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach Green Helix.
7 tools across 3 categories: Financial, Read, Write. 3 are read-only. 4 can modify, create, or delete data.
Register the Green Helix MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.
Deterministic rules across all 7 Green Helix tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Instant setup, no code required.
7 Green Helix tools catalogued and risk-classified — across an index of 43,000+ MCP servers.