word_closeActiveDocument

THE RISK

Medium Risk

Why word_closeActiveDocument needs a policy

This tool modifies the persistent state of the file system by saving document changes before closing. Although closing itself is reversible (the document can be reopened), the save functionality commits changes irreversibly to disk.

From the tool's definition Tool description states it 'Closes the currently active Word document, optionally saving changes.' The 'optionally saving changes' clause indicates the tool can persist modifications to disk, making it a Write operation.

Documented attack patterns abuse exactly the kind of access word_closeActiveDocument gives an agent:

POLICY

How to control word_closeActiveDocument

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Office Interop Word Server, and nothing reaches the server without passing your rules. This is the rule we recommend for word_closeActiveDocument:

policy.json

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

word_closeActiveDocument 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.

Create a free account and register MCP Office Interop Word Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More MCP Office Interop Word Server tools

Destructive word_deleteText Deletes text relative to the current selection in the active Word document. Execute word_collapseSelection Collapses the current selection to its start or end point. Execute word_moveCursor Moves the cursor by the specified unit and count. Write word_findAndReplace Finds and replaces text within the active Word document. Write word_addTable Adds a new table at the current selection point. Write word_applyTableAutoFormat Applies a predefined style or autoformat to a table. Write word_createDocument Creates a new, blank Word document. Write word_insertPicture Inserts a picture from a file path into the active document at the selection point.

All 37 MCP Office Interop Word Server tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about word_closeActiveDocument

What does the word_closeActiveDocument tool do? +

Closes the currently active Word document, optionally saving changes. It is categorised as a Write tool in the MCP Office Interop Word Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on word_closeActiveDocument? +

Register the MCP Office Interop Word Server MCP server in PolicyLayer and add a rule for word_closeActiveDocument: 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 Office Interop Word Server. Nothing to install.

What risk level is word_closeActiveDocument? +

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

Can I rate-limit word_closeActiveDocument? +

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

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

word_closeActiveDocument is provided by the MCP Office Interop Word Server MCP server (mario-andreschak/mcp-msoffice-interop-word). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Office Interop Word Server tool call.

Start from MCP Office Interop Word Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →