wiki_asset_upload · Mcp Wikijs Mv MCP: Risk & Policy

WHAT IT DOES

What wiki_asset_upload does on Mcp Wikijs Mv

AI agents use wiki_asset_upload to create or update resources in Mcp Wikijs Mv — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Wikijs Mv environment.

WHY IT NEEDS A POLICY

Why wiki_asset_upload needs a policy

This tool creates new file assets in the Wiki.js system by uploading and storing file content. It is a Write operation because it creates/adds new data (files) to the asset storage system, with reversible effects (uploaded files can be deleted via wiki_asset_delete). It does not execute code, delete data permanently, or move money.

From the tool's definition Upload a file/image into an asset folder. Pass the file content base64-encoded in contentBase64.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wiki_asset_upload Rate-limited

wiki_asset_upload 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "wiki_asset_upload": {
      "limits": [
        {
          "counter": "wiki_asset_upload_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp Wikijs Mv, so you can run agents against it safely.

FAQ

Questions about wiki_asset_upload

What does the wiki_asset_upload tool do? +

Upload a file/image into an asset folder. Pass the file content base64-encoded in contentBase64. It is categorised as a Write tool in the Mcp Wikijs Mv MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on wiki_asset_upload? +

Register the Mcp Wikijs Mv MCP server in PolicyLayer and add a rule for wiki_asset_upload: 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 Mcp Wikijs Mv. Nothing to install.

What risk level is wiki_asset_upload? +

wiki_asset_upload is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit wiki_asset_upload? +

Yes. Add a rate_limit block to the wiki_asset_upload 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.

How do I block wiki_asset_upload completely? +

Set action: deny in the PolicyLayer policy for wiki_asset_upload. 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.

What MCP server provides wiki_asset_upload? +

wiki_asset_upload is provided by the Mcp Wikijs Mv MCP server (janschachtschabel/mcp-for-wiki-js). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.