set_run_font

Set the font of a specific run (zero-based index) in a paragraph.

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/set-run-font.md

WHAT IT DOES

What set_run_font does on Docx

AI agents use set_run_font 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 set_run_font is rated Medium

This tool creates or modifies document data (font properties) in a reversible manner. Changing font formatting is a standard write operation that does not delete data, execute arbitrary code, or trigger financial transactions. The modification is easily undoable (can be reset to a previous font), making it clearly a Write category tool rather than Destructive.

From the tool's definition Tool description states 'Set the font of a specific run' which modifies document formatting. The server description confirms it enables 'editing' of Word documents with 'OOXML-level document manipulation.'

Attacks that exploit this kind of access

RECOMMENDED RULE

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

set_run_font Rate-limited

set_run_font 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": {
    "set_run_font": {
      "limits": [
        {
          "counter": "set_run_font_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 set_run_font call is checked against it from then on.

FAQ

Questions about set_run_font

What does the set_run_font tool do? +

Set the font of a specific run (zero-based index) in a paragraph. 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 set_run_font? +

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

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

Can I rate-limit set_run_font? +

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

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

set_run_font 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

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All 219 Docx tools →

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Guides

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