3 tools. 2 can modify or destroy data without limits.
2 destructive tools with no built-in limits. Policy required.
Last updated:
Community server · catalogue entry checked 07/07/2026
Running more than one server? Check your whole stack →
2 of A2a Demos's 3 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 A2a Demos, and nothing reaches the server without passing your rules. These are the rules we recommend:
{
"place_order": {
"deny_if": [
{
"conditions": [],
"on_deny": "Requires human approval."
}
]
}
} Financial tools should be explicitly enabled per use case, not open by default.
{
"cancel_all_orders": {
"deny_if": [
{
"conditions": [],
"on_deny": "Blocked by default. Requires approval."
}
]
}
} Destructive tools should never be available to autonomous agents without human approval.
{
"get_price": {
"limits": [
{
"counter": "get_price_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 A2a Demos server exposes 1 financial tools including place_order. 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.
Yes. The A2a Demos server exposes 1 destructive tools including cancel_all_orders. These permanently remove resources with no undo. PolicyLayer blocks destructive tools by default so they never reach the upstream server.
3 tools across 2 categories: Destructive, Read. 1 are read-only. 2 can modify, create, or delete data.
Register the A2a Demos 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 3 A2a Demos tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Instant setup, no code required.
3 A2a Demos tools catalogued and risk-classified — across an index of 46,500+ MCP servers.
These policies come from A2a Demos's registry record.
The record behind this page: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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