add_table · Docx MCP: Risk & Policy

WHAT IT DOES

What add_table does on Docx

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

WHY IT NEEDS A POLICY

Why add_table needs a policy

The tool creates or modifies document structure by adding a table to a .docx file. This is a Write operation because it creates new content reversibly without deleting data or executing external code. Severity is medium because misuse could add unwanted content to documents, but the effect is reversible and contained to the document being edited.

From the tool's definition Tool name 'add_table' and server description stating 'edit, and create Microsoft Word documents' with 'support for rich text, tables' indicates the tool adds/modifies document content. This is a reversible modification—tables can be edited or deleted.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_table Rate-limited

add_table 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": {
    "add_table": {
      "limits": [
        {
          "counter": "add_table_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 Docx, so you can run agents against it safely.

FAQ

Questions about add_table

What does the add_table tool do? +

Add a table. It is categorised as a Write tool in the Docx MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_table? +

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

What risk level is add_table? +

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

Can I rate-limit add_table? +

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

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

add_table is provided by the Docx MCP server (okamifeng/docx-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.