inbound · Brevo MCP Server MCP: Risk & Policy

WHAT IT DOES

What inbound does on Brevo MCP Server

AI agents use inbound to create or update resources in Brevo MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Brevo MCP Server environment.

WHY IT NEEDS A POLICY

Why inbound needs a policy

The tool processes inbound emails and attachments, which involves ingesting external data into the system. While it reads incoming emails, the primary action is to process and store them, creating or modifying records within Brevo's system. This constitutes a Write operation rather than pure Read.

From the tool's definition Tool name 'inbound' with description 'Process inbound emails and attachments' indicates receiving and handling email data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

inbound Rate-limited

inbound stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "inbound": {
      "limits": [
        {
          "counter": "inbound_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about inbound

What does the inbound tool do? +

Process inbound emails and attachments. It is categorised as a Write tool in the Brevo MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on inbound? +

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

What risk level is inbound? +

inbound is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit inbound? +

Yes. Add a rate_limit block to the inbound 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 inbound completely? +

Set action: deny in the PolicyLayer policy for inbound. 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 inbound? +

inbound is provided by the Brevo MCP Server MCP server (samihalawa/brevo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.