List all SMS messages in your VoIPbin account.
AI agents call list_messages to retrieve information from VoIPbin MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing SMS message data without side effects. It matches the Read category (search, list, get, fetch). Severity is medium rather than low because SMS messages may contain sensitive personal information, authentication codes, or business-critical communications, making unauthorized access to the full message history a material risk if an AI agent is compromised or misdirected.
From the tool's definition Tool name is 'list_messages' and description states 'List all SMS messages in your VoIPbin account' — a retrieval operation with no modification or deletion of data.
Attacks that exploit this kind of access
List all SMS messages in your VoIPbin account. It is categorised as a Read tool in the VoIPbin MCP Server MCP Server, which means it retrieves data without modifying state.
Register the VoIPbin MCP Server MCP server in PolicyLayer and add a rule for list_messages: 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 VoIPbin MCP Server. Nothing to install.
list_messages is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_messages 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 list_messages. 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.
list_messages is provided by the VoIPbin MCP Server MCP server (voipbin/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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