Check if a specific IP address is currently banned by Fail2Ban
AI agents call plesk_fail2ban_check_ip to retrieve information from Plesk 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 information about Fail2Ban's current ban list without side effects. It performs a query operation that does not create, modify, delete, or execute any actions. The check is purely informational, making it a Read category tool with low severity.
From the tool's definition Tool name contains 'check' and description states 'Check if a specific IP address is currently banned' — a read-only query operation that retrieves the ban status of an IP without modifying any state.
Attacks that exploit this kind of access
Check if a specific IP address is currently banned by Fail2Ban. It is categorised as a Read tool in the Plesk MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Plesk MCP Server MCP server in PolicyLayer and add a rule for plesk_fail2ban_check_ip: 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 Plesk MCP Server. Nothing to install.
plesk_fail2ban_check_ip 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 plesk_fail2ban_check_ip 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 plesk_fail2ban_check_ip. 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.
plesk_fail2ban_check_ip is provided by the Plesk MCP Server MCP server (klan1/plesk-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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