Get MX records for a domain.
AI agents call get_mx_records to retrieve information from BasicSec MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
MX record retrieval is a read-only DNS query operation that returns publicly available domain information without modifying any data or triggering external actions. There is no mechanism for the tool to delete, modify, execute arbitrary code, or commit financial transactions. Severity is low as misuse would only expose standard DNS information already publicly accessible.
From the tool's definition Tool retrieves MX records for a domain with no side effects. The description explicitly states 'Get MX records' which is a query/retrieval operation.
Attacks that exploit this kind of access
Get MX records for a domain. It is categorised as a Read tool in the BasicSec MCP Server MCP Server, which means it retrieves data without modifying state.
Register the BasicSec MCP Server MCP server in PolicyLayer and add a rule for get_mx_records: 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 BasicSec MCP Server. Nothing to install.
get_mx_records 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 get_mx_records 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 get_mx_records. 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.
get_mx_records is provided by the BasicSec MCP Server MCP server (marlinkcyber/basicsec-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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