한국이 아닌 국가로 국제 SMS 메시지를 발송합니다. 국가 코드(country)와 함께 호출. ⚠️ 한국(82) 은 이 도구를 사용하지 말고 send_message 로 발송하세요. 텍스트 길이는 최대 500 글자. ASCII 만 포함된 경우 160 byte / SMS, 유니코드 포함 시 70자 / SMS 기준으로 초과 시 서버에서 자동 concat(LMS) 처리. 중국(86) 은 슈어엠 정책상 항상 유니코드 모드로 계산됨. 국제 발송의 발신번호는 슈어비즈 사전 등록 여부와 무관하게 사용 가능 (국내 send_message 와 ...
AI agents use send_international_message to create or update resources in SureM SMS MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SureM SMS MCP environment.
Sending SMS messages is a Write operation—it transmits data to external parties and creates records, but does not irreversibly delete data (Destructive), execute arbitrary code (Execute), or move money (Financial). Severity is medium because unsolicited or malicious SMS campaigns could constitute spam/harassment with moderate business impact, though individual message sends are reversible in intent.
From the tool's definition Tool description states it sends international SMS messages ("국제 SMS 메시지를 발송"). This is a message transmission action that creates/modifies state in external systems (recipient inboxes, carrier logs, billing records).
Attacks that exploit this kind of access
한국이 아닌 국가로 국제 SMS 메시지를 발송합니다. 국가 코드(country)와 함께 호출. ⚠️ 한국(82) 은 이 도구를 사용하지 말고 send_message 로 발송하세요. 텍스트 길이는 최대 500 글자. ASCII 만 포함된 경우 160 byte / SMS, 유니코드 포함 시 70자 / SMS 기준으로 초과 시 서버에서 자동 concat(LMS) 처리. 중국(86) 은 슈어엠 정책상 항상 유니코드 모드로 계산됨. 국제 발송의 발신번호는 슈어비즈 사전 등록 여부와 무관하게 사용 가능 (국내 send_message 와 다름). It is categorised as a Write tool in the SureM SMS MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the SureM SMS MCP server in PolicyLayer and add a rule for send_international_message: 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 SureM SMS MCP. Nothing to install.
send_international_message is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the send_international_message 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 send_international_message. 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.
send_international_message is provided by the SureM SMS MCP server (suremapp/surem-sms-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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