replace_text

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/replace-text.md

WHAT IT DOES

What replace_text does on Docx

AI agents use replace_text 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 replace_text is rated Medium

The tool modifies document content by replacing text, which is a Write-category operation (creates or modifies data reversibly). It is not Destructive because replacements can typically be undone. Severity is medium because an AI agent could introduce text that changes document meaning, legally binding language, or embed malicious content, though the blast radius is contained to the document itself.

From the tool's definition The tool is named 'replace_text' and sits on a Microsoft Word document server (docx-mcp) that 'enables editing...document manipulation.' Replacement of text in a document is a reversible modification operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs replace_text 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 replace_text, this is the rule to start with:

replace_text Rate-limited

replace_text 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": {
    "replace_text": {
      "limits": [
        {
          "counter": "replace_text_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 replace_text call is checked against it from then on.

FAQ

Questions about replace_text

What does the replace_text tool do? +

replace_text 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 replace_text? +

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

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

Can I rate-limit replace_text? +

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

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

replace_text 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 →