AI agents call remove_file 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 performs an irreversible deletion operation on files. According to the classification rules, destructive actions that cannot be undone (delete, drop, purge) take precedence over other categories.
From the tool's definition Tool name 'remove_file' combined with description '删除文件' (Chinese: 'delete file') indicates irreversible file deletion. This operation cannot be undone and permanently removes data from the SiYuan note system.
Documented attack patterns abuse exactly the kind of access remove_file 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_file:
{
"version": "1",
"default": "deny",
"hide": [
"remove_file"
]
}remove_file disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
Free to start. No card required.
删除文件. 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_file: 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_file 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_file 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_file. 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_file 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.