AI agents call remove_doc to permanently remove resources in SiYuan MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
The tool removes/deletes a document, which cannot be undone. This is an irreversible data destruction operation that permanently removes user content from their SiYuan notebook. Even though the blast radius depends on which document is targeted, document deletion is categorically Destructive, and the severity is high because it affects user data persistence.
From the tool's definition Tool name 'remove_doc' and Chinese description '删除文档' (delete document) indicate irreversible deletion of a document. Sibling tool 'delete_block' on the same server confirms this server handles destructive operations.
Documented attack patterns abuse exactly the kind of access remove_doc gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SiYuan MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for remove_doc:
{
"version": "1",
"default": "deny",
"hide": [
"remove_doc"
]
}remove_doc disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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删除文档. It is categorised as a Destructive tool in the SiYuan MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the SiYuan MCP Server MCP server in PolicyLayer and add a rule for remove_doc: 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 SiYuan MCP Server. Nothing to install.
remove_doc is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the remove_doc 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 remove_doc. 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.
remove_doc is provided by the SiYuan MCP Server MCP server (xgq18237/siyuan_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 52 SiYuan MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
52 SiYuan MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.