sms_send_bulk

A write tool on the Twilio SMS MCP server.

SERVERTwilio SMS MCP Server SOURCE0x-professor/twilio-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/0x-professor-twilio-mcp-server/sms-send-bulk.md

WHAT IT DOES

What sms_send_bulk does on Twilio SMS MCP Server

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

RISK

Why sms_send_bulk is rated Medium

The tool name strongly implies sending bulk SMS/MMS messages, which is a Write operation (creating outbound messages). The description is empty, lowering confidence. Severity is high because an AI agent misusing this tool could send mass unsolicited messages to large numbers of recipients, causing significant harm, potential legal liability, and financial cost — though financial impact is indirect (Twilio charges…

From the tool's definition Tool name 'sms_send_bulk' on a Twilio SMS server that 'Enables AI agents to send, receive, schedule, and manage SMS and MMS messages'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs sms_send_bulk safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Twilio SMS MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sms_send_bulk, this is the rule to start with:

sms_send_bulk Rate-limited

sms_send_bulk 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": {
    "sms_send_bulk": {
      "limits": [
        {
          "counter": "sms_send_bulk_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Twilio SMS MCP Server, apply this rule, and every sms_send_bulk call is checked against it from then on.

FAQ

Questions about sms_send_bulk

What does the sms_send_bulk tool do? +

sms_send_bulk is a write tool on the Twilio SMS MCP Server MCP server. It is categorised as a Write tool in the Twilio SMS 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 sms_send_bulk? +

Register the Twilio SMS MCP Server MCP server in PolicyLayer and add a rule for sms_send_bulk: 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 Twilio SMS MCP Server. Nothing to install.

What risk level is sms_send_bulk? +

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

Can I rate-limit sms_send_bulk? +

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

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

sms_send_bulk is provided by the Twilio SMS MCP Server MCP server (0x-professor/twilio-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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