send_buttons · Evolution API WhatsApp MCP Server MCP

WHAT IT DOES

What send_buttons does on Evolution API WhatsApp MCP Server

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

WHY IT NEEDS A POLICY

Why send_buttons needs a policy

This tool sends a WhatsApp message (creates outbound communication), which is a reversible write operation. It does not delete data or execute arbitrary code. Severity is medium because it enables mass messaging or spam if misused, but has limited blast radius compared to destructive or financial actions.

From the tool's definition 'Send message with buttons' — creates and sends a new WhatsApp message with interactive button components to a recipient

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_buttons Rate-limited

send_buttons 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": {
    "send_buttons": {
      "limits": [
        {
          "counter": "send_buttons_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 Evolution API WhatsApp MCP Server, so you can run agents against it safely.

FAQ

Questions about send_buttons

What does the send_buttons tool do? +

Send message with buttons. It is categorised as a Write tool in the Evolution API WhatsApp 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 send_buttons? +

Register the Evolution API WhatsApp MCP Server MCP server in PolicyLayer and add a rule for send_buttons: 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 Evolution API WhatsApp MCP Server. Nothing to install.

What risk level is send_buttons? +

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

Can I rate-limit send_buttons? +

Yes. Add a rate_limit block to the send_buttons 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_buttons completely? +

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

send_buttons is provided by the Evolution API WhatsApp MCP Server MCP server (luiso2/mcp-evolution-api). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.