AI agents use wikijs_sync_file_docs to create or update resources in Wiki Js — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Wiki Js environment.
The tool syncs (updates/writes) content to a Wiki.js page in response to a code change. This is a reversible write operation — it modifies existing page content. While it could overwrite content, there's no explicit indication of irreversible deletion. Severity is medium because misuse could corrupt or overwrite documentation across linked pages.
From the tool's definition Sync a code change to the linked Wiki.js page
Documented attack patterns abuse exactly the kind of access wikijs_sync_file_docs gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Wiki Js, and nothing reaches the server without passing your rules. This is the rule we recommend for wikijs_sync_file_docs:
{
"version": "1",
"default": "deny",
"tools": {
"wikijs_sync_file_docs": {
"limits": [
{
"counter": "wikijs_sync_file_docs_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}wikijs_sync_file_docs stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Sync a code change to the linked Wiki.js page. It is categorised as a Write tool in the Wiki Js MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Wiki Js MCP server in PolicyLayer and add a rule for wikijs_sync_file_docs: 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 Wiki Js. Nothing to install.
wikijs_sync_file_docs is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the wikijs_sync_file_docs 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 wikijs_sync_file_docs. 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.
wikijs_sync_file_docs is provided by the Wiki Js MCP server (talosdeus/wiki-js-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 21 Wiki Js tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
21 Wiki Js tools catalogued and risk-classified — across an index of 42,500+ MCP servers.