在EPUB文件中搜索文本
AI agents call epub_search 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 only retrieves and queries text content from EPUB documents without modifying, executing code, deleting data, or committing financial obligations. Search operations are inherently read-only. The low severity reflects minimal risk—misuse would only allow an agent to read already-accessible EPUB content.
From the tool's definition The tool name is 'epub_search' and description indicates it searches text within EPUB files ('在EPUB文件中搜索文本' translates to 'Search text in EPUB files'). The operation is a query/search function with no side effects on the file.
Attacks that exploit this kind of access
在EPUB文件中搜索文本. 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_search: 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_search 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_search 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_search. 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_search 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.
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