contacts · Brevo MCP Server MCP: Risk & Policy

WHAT IT DOES

What contacts does on Brevo MCP Server

AI agents use contacts 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 contacts needs a policy

This tool modifies contact data through create and update operations, which are reversible. While it has read capabilities ('get'), the primary risk comes from creating/updating contact records at scale (bulk import).

From the tool's definition Tool description explicitly states 'create, update' operations on contacts, which are reversible data modifications. The mention of 'bulk import' and 'manage lists and attributes' further confirms write capabilities.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

contacts Rate-limited

contacts 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": {
    "contacts": {
      "limits": [
        {
          "counter": "contacts_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 contacts

What does the contacts tool do? +

Comprehensive contact management - create, update, get, bulk import, manage lists and attributes. 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 contacts? +

Register the Brevo MCP Server MCP server in PolicyLayer and add a rule for contacts: 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 contacts? +

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

Can I rate-limit contacts? +

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

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

contacts 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.