Download file content from the Kali server as base64.
AI agents call kali_download to retrieve information from Zebbern Kali MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves file content in encoded form, which is fundamentally a read operation. While the Kali server context implies the tool is part of a penetration testing toolkit with elevated privileges, the specific action described—downloading/retrieving file content—produces no side effects on the target system.
From the tool's definition Tool name 'kali_download' and description 'Download file content from the Kali server as base64' indicate retrieval of data without modification or deletion.
Documented attack patterns abuse exactly the kind of access kali_download gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Zebbern Kali MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for kali_download:
{
"version": "1",
"default": "deny",
"tools": {
"kali_download": {}
}
}kali_download is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Download file content from the Kali server as base64. It is categorised as a Read tool in the Zebbern Kali MCP MCP Server, which means it retrieves data without modifying state.
Register the Zebbern Kali MCP server in PolicyLayer and add a rule for kali_download: 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.
kali_download 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 kali_download 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 kali_download. 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.
kali_download 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.
Deterministic rules across all 128 Zebbern Kali MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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128 Zebbern Kali MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.