hosts_clear
A destructive tool on the Zebbern Kali MCP server.
This record as markdown: /tools/zebbern-zebbern-kali-mcp/hosts-clear.md
What hosts_clear does on Zebbern Kali MCP
AI agents call hosts_clear to permanently remove resources in Zebbern Kali MCP, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why hosts_clear is rated Critical
The tool operates in a Kali Linux environment (offensive security toolkit) and the name 'hosts_clear' strongly indicates cache clearing or hosts file manipulation. If this clears DNS cache or system hosts entries, it cannot be easily undone without re-population. While the empty description reduces confidence slightly, the naming convention and toolkit context together point to a destructive action.
From the tool's definition Tool name 'hosts_clear' in a Kali Linux penetration testing toolkit suggests clearing/flushing the hosts cache or hosts file entries. The suffix '_clear' implies deletion or irreversible removal of data.
Attacks that exploit this kind of access
The rule that runs hosts_clear safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Zebbern Kali MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For hosts_clear, this is the rule to start with:
hosts_clear is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Zebbern Kali MCP, apply this rule, and every hosts_clear call is checked against it from then on.
Questions about hosts_clear
hosts_clear is a destructive tool on the Zebbern Kali MCP server. It is categorised as a Destructive tool in the Zebbern Kali MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Zebbern Kali MCP server in PolicyLayer and add a rule for hosts_clear: 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 Zebbern Kali MCP. Nothing to install.
hosts_clear is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the hosts_clear 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 hosts_clear. 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.
hosts_clear is provided by the Zebbern Kali MCP server (zebbern/zebbern-kali-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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