AI agents call list-zim-files to retrieve information from ZIM MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a directory listing operation to enumerate available ZIM files. It retrieves information without modifying, executing, or deleting anything. The 'allowed directories' constraint further indicates a read-only scope. The blast radius is minimal—knowing which files exist poses no direct risk to data integrity or security beyond potential information disclosure about available content.
From the tool's definition Tool name 'list-zim-files' and description 'List all ZIM files in allowed directories' indicate a retrieval operation with no side effects. Server context confirms 'reading and searching ZIM files for offline reference content.'
Documented attack patterns abuse exactly the kind of access list-zim-files gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ZIM MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list-zim-files:
{
"version": "1",
"default": "deny",
"tools": {
"list-zim-files": {}
}
}list-zim-files is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
List all ZIM files in allowed directories. It is categorised as a Read tool in the ZIM MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ZIM MCP Server MCP server in PolicyLayer and add a rule for list-zim-files: 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 ZIM MCP Server. Nothing to install.
list-zim-files 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 list-zim-files 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 list-zim-files. 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.
list-zim-files is provided by the ZIM MCP Server MCP server (zicojiao/zim-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from ZIM MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
3 ZIM MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.