edit_document · Huly MCP: Risk & Policy

WHAT IT DOES

What edit_document does on Huly

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

WHY IT NEEDS A POLICY

Why edit_document needs a policy

An AI agent can call edit_document faster than any human can review — one bad instruction and it creates or modifies resources in Huly by the hundred, each call as confident as the last.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

edit_document Rate-limited

edit_document 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": {
    "edit_document": {
      "limits": [
        {
          "counter": "edit_document_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 Huly, so you can run agents against it safely.

FAQ

Questions about edit_document

What does the edit_document tool do? +

Edit an existing Huly document. You may rename with title and/or edit the body. Body editing has two mutually exclusive modes: (1) content replaces the entire markdown body, (2) old_text + new_text performs exact targeted search-and-replace. It is categorised as a Write tool in the Huly MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on edit_document? +

Register the Huly MCP server in PolicyLayer and add a rule for edit_document: 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 Huly. Nothing to install.

What risk level is edit_document? +

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

Can I rate-limit edit_document? +

Yes. Add a rate_limit block to the edit_document 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 edit_document completely? +

Set action: deny in the PolicyLayer policy for edit_document. 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 edit_document? +

edit_document is provided by the Huly MCP server (@firfi/huly-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.