AI agents invoke twilio_send_sms to trigger actions in autoMate. 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.
Sending an SMS triggers an external operation (message delivery to a phone number) with real-world side effects. It falls under Execute as it triggers an external communication operation. Severity is high because a misused tool could send unwanted messages to arbitrary recipients at scale, potentially causing harassment, phishing, or financial costs (SMS charges).
From the tool's definition Tool name 'twilio_send_sms' implies sending an SMS message via Twilio; description is empty and uninformative.
Documented attack patterns abuse exactly the kind of access twilio_send_sms gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and autoMate, and nothing reaches the server without passing your rules. This is the rule we recommend for twilio_send_sms:
{
"version": "1",
"default": "deny",
"tools": {
"twilio_send_sms": {
"limits": [
{
"counter": "twilio_send_sms_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}twilio_send_sms 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.
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twilio_send_sms. It is categorised as a Execute tool in the autoMate MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the autoMate MCP server in PolicyLayer and add a rule for twilio_send_sms: 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 autoMate. Nothing to install.
twilio_send_sms is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the twilio_send_sms 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.
Set action: deny in the PolicyLayer policy for twilio_send_sms. 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.
twilio_send_sms is provided by the autoMate MCP server (yuruotong1/automate). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 128 autoMate tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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128 autoMate tools catalogued and risk-classified — across an index of 42,500+ MCP servers.