send_event · Fuul MCP Server MCP: Risk & Policy

WHAT IT DOES

What send_event does on Fuul MCP Server

AI agents invoke send_event to trigger actions in Fuul MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why send_event needs a policy

The name 'send_event' implies triggering or dispatching an event to an external system, which is an Execute-category action. In the context of an affiliate/payout platform, sending events could trigger downstream financial or workflow consequences (e.g., conversion events that initiate payouts or commission tracking).

From the tool's definition Tool name 'send_event' on a server that 'Manages affiliate programs, analytics, incentives, and payouts'; description is empty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_event Rate-limited

send_event stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "send_event": {
      "limits": [
        {
          "counter": "send_event_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Fuul MCP Server, so you can run agents against it safely.

FAQ

Questions about send_event

What does the send_event tool do? +

send_event. It is categorised as a Execute tool in the Fuul MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on send_event? +

Register the Fuul MCP Server MCP server in PolicyLayer and add a rule for send_event: 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 Fuul MCP Server. Nothing to install.

What risk level is send_event? +

send_event is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit send_event? +

Yes. Add a rate_limit block to the send_event 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.

How do I block send_event completely? +

Set action: deny in the PolicyLayer policy for send_event. 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.

What MCP server provides send_event? +

send_event is provided by the Fuul MCP Server MCP server (kuyen-labs/mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.