modify_cell

A write tool on the Docx MCP server.

SERVERDocx SOURCEsecurityronin/docx-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/securityronin-docx-mcp/modify-cell.md

WHAT IT DOES

What modify_cell does on Docx

AI agents use modify_cell 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.

RISK

Why modify_cell is rated Medium

The tool modifies cell content within Word document tables. This is a reversible write operation—the changes can be undone or overwritten. It does not delete data (would be Destructive), execute arbitrary code (would be Execute), or move money (would be Financial). The empty description lowers confidence slightly, but the name and server context provide sufficient indication of write-class functionality.

From the tool's definition Tool name 'modify_cell' combined with server context showing 'editing' Word documents and sibling tools like 'add_comment', 'add_bookmark', 'add_content_control' that perform reversible modifications.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs modify_cell safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Docx, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For modify_cell, this is the rule to start with:

modify_cell Rate-limited

modify_cell 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": {
    "modify_cell": {
      "limits": [
        {
          "counter": "modify_cell_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Docx, apply this rule, and every modify_cell call is checked against it from then on.

FAQ

Questions about modify_cell

What does the modify_cell tool do? +

modify_cell is a write tool on the Docx MCP server. 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 modify_cell? +

Register the Docx MCP server in PolicyLayer and add a rule for modify_cell: 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 modify_cell? +

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

Can I rate-limit modify_cell? +

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

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

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

KEEP EXPLORING

More on Docx, and thousands of servers like it.

This server

All 219 Docx tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →