获取EPUB文件的目录结构
AI agents call epub_toc to retrieve information from Epub Parser without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and returns the table of contents structure from an EPUB file. It is a read-only operation that extracts existing information without creating, modifying, deleting, or executing any code. The operation has no side effects and presents minimal security risk even if misused by an AI agent.
From the tool's definition Tool name 'epub_toc' and description '获取EPUB文件的目录结构' (get the table of contents structure of EPUB files) indicates retrieval of metadata/structural information from an EPUB document without modification.
Attacks that exploit this kind of access
获取EPUB文件的目录结构. It is categorised as a Read tool in the Epub Parser MCP Server, which means it retrieves data without modifying state.
Register the Epub Parser MCP server in PolicyLayer and add a rule for epub_toc: 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 Epub Parser. Nothing to install.
epub_toc 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 epub_toc 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 epub_toc. 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.
epub_toc is provided by the Epub Parser MCP server (kala51773/epub-parser-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.
Teams ship this data inside their own products. See what a licence covers →