Apply formatting (color/bold/italic/underline/font_size) to the first run that contains target_text. Adds a new charPr to header.xml and retargets the matching <hp:run>. Color is a 6-digit hex (e.g.
AI agents use apply_hwp_text_style to create or update resources in Hwp — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Hwp environment.
The tool creates or modifies document formatting in a reversible manner—changes to text styling can be undone or overwritten. While it affects document structure (adding to header.xml), it does not delete content, execute arbitrary code, or cause irreversible damage. This is characteristic of Write operations.
From the tool's definition Tool applies formatting changes (color/bold/italic/underline/font_size) to text in a document by adding charPr elements and modifying runs in the XML structure. This modifies document content reversibly.
Documented attack patterns abuse exactly the kind of access apply_hwp_text_style gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Hwp, and nothing reaches the server without passing your rules. This is the rule we recommend for apply_hwp_text_style:
{
"version": "1",
"default": "deny",
"tools": {
"apply_hwp_text_style": {
"limits": [
{
"counter": "apply_hwp_text_style_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}apply_hwp_text_style 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.
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Apply formatting (color/bold/italic/underline/font_size) to the first run that contains target_text. Adds a new charPr to header.xml and retargets the matching <hp:run>. Color is a 6-digit hex (e.g. It is categorised as a Write tool in the Hwp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Hwp MCP server in PolicyLayer and add a rule for apply_hwp_text_style: 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 Hwp. Nothing to install.
apply_hwp_text_style is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the apply_hwp_text_style 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.
Set action: deny in the PolicyLayer policy for apply_hwp_text_style. 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.
apply_hwp_text_style is provided by the Hwp MCP server (treesoop/hwp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 31 Hwp tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
31 Hwp tools catalogued and risk-classified — across an index of 42,500+ MCP servers.