add_heading

THE RISK

Medium Risk

Why add_heading needs a policy

This tool creates or modifies document structure by adding a heading element with specified text and formatting level. This is a reversible Write operation—the heading can be deleted or modified later. It does not execute arbitrary code, delete data irreversibly, or move money.

From the tool's definition Tool name 'add_heading' and description 'Add heading to document' indicate creation/modification of document content. Server description confirms it 'create[s], edit[s], and manage[s] docx files'.

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

POLICY

How to control add_heading

PolicyLayer is an MCP gateway — it sits between your AI agents and Doc/docx, and nothing reaches the server without passing your rules. This is the rule we recommend for add_heading:

policy.json

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

add_heading 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 Doc/docx — 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 Doc/docx tools

Destructive delete_paragraph Delete specified paragraph from document Parameters: - paragraph_index: Parag Destructive delete_table_row Delete a row from table Parameters: - table_index: Table index - row_inde Destructive delete_text Delete specified text from paragraph Parameters: - paragraph_index: Paragraph Write find_and_replace Find and replace text in the document Parameters: - find_text: Text to find Write search_and_replace Search and replace text in the document, providing detailed replacement information and pr Write add_page_break Add page break Write add_paragraph Add paragraph text to document Parameters: - text: Paragraph text content Write add_table Add table to document Parameters: - rows: Number of rows - cols: Number o

All 23 Doc/docx tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

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 add_heading

What does the add_heading tool do? +

Add heading to document Parameters: - text: Heading text - level: Heading level (1-9). It is categorised as a Write tool in the Doc/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_heading? +

Register the Doc/docx MCP server in PolicyLayer and add a rule for add_heading: 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 Doc/docx. Nothing to install.

What risk level is add_heading? +

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

Can I rate-limit add_heading? +

Yes. Add a rate_limit block to the add_heading 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_heading completely? +

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

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

Enforce policy on every Doc/docx tool call.

Start from Doc/docx, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →