AI agents call extract_images to retrieve information from Docx_MCP_cj without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves/extracts images from a Word document without altering, deleting, or executing any operations. It is a pure read operation that queries and returns existing document content. The low severity reflects minimal risk—image extraction cannot harm systems or undo operations, though some sensitivity may apply if documents contain confidential imagery.
From the tool's definition Tool name 'extract_images' and description '提取文档中的所有图片' (extract all images from document) indicate data retrieval with no modification or side effects.
Documented attack patterns abuse exactly the kind of access extract_images gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Docx_MCP_cj, and nothing reaches the server without passing your rules. This is the rule we recommend for extract_images:
{
"version": "1",
"default": "deny",
"tools": {
"extract_images": {}
}
}extract_images is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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提取文档中的所有图片. It is categorised as a Read tool in the Docx_MCP_cj MCP Server, which means it retrieves data without modifying state.
Register the Docx_MCP_cj MCP server in PolicyLayer and add a rule for extract_images: 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 Docx_MCP_cj. Nothing to install.
extract_images 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 extract_images 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 extract_images. 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.
extract_images is provided by the Docx_MCP_cj MCP server (rockcj/docx_mcp_cj). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 54 Docx_MCP_cj tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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54 Docx_MCP_cj tools catalogued and risk-classified — across an index of 42,500+ MCP servers.