AI agents call get_all_epub_files to retrieve information from Ebook without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and lists EPUB files from a filesystem path. It retrieves data without side effects—no data is created, modified, deleted, or executed. This is a straightforward Read operation with minimal risk; the only concern is potential exposure of file paths or filenames in a given directory.
From the tool's definition Tool name 'get_all_epub_files' and description 'Get all epub files in a given path' indicate a retrieval/listing operation with no modification or execution.
Documented attack patterns abuse exactly the kind of access get_all_epub_files gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ebook, and nothing reaches the server without passing your rules. This is the rule we recommend for get_all_epub_files:
{
"version": "1",
"default": "deny",
"tools": {
"get_all_epub_files": {}
}
}get_all_epub_files is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get all epub files in a given path. It is categorised as a Read tool in the Ebook MCP Server, which means it retrieves data without modifying state.
Register the Ebook MCP server in PolicyLayer and add a rule for get_all_epub_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 Ebook. Nothing to install.
get_all_epub_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 get_all_epub_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 get_all_epub_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.
get_all_epub_files is provided by the Ebook MCP server (onebirdrocks/ebook-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 10 Ebook tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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10 Ebook tools catalogued and risk-classified — across an index of 42,500+ MCP servers.