AI agents call download_file to retrieve information from Kali without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves files from an isolated container without modifying, deleting, or executing operations. It is a straightforward read operation. Severity is low because the blast radius of misuse is limited to information disclosure from within an already-isolated container environment; no destructive or executable actions are possible through this tool alone.
From the tool's definition Tool name is 'download_file' and description states 'Read/download a file from the Kali Linux container.' The verb 'download' and 'read' explicitly indicate data retrieval with no modification or side effects.
Attacks that exploit this kind of access
Read/download a file from the Kali Linux container. Useful for retrieving scan results and output files. It is categorised as a Read tool in the Kali MCP Server, which means it retrieves data without modifying state.
Register the Kali MCP server in PolicyLayer and add a rule for download_file: 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 Kali. Nothing to install.
download_file 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 download_file 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 download_file. 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.
download_file is provided by the Kali MCP server (unaacceptable297/kali-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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