AI agents use hwp_set_font to create or update resources in HWP MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your HWP MCP Server environment.
The tool modifies font properties of text within a HWP document, which is a write operation that changes document state reversibly. It does not execute arbitrary code, delete content, or cause financial impact. Severity is medium because unintended font changes across a document could affect document integrity or appearance, but the changes are easily undoable and localized to formatting only.
From the tool's definition Tool name 'hwp_set_font' and description 'Set font properties for selected text' indicate modification of document properties. This is a reversible change to HWP document formatting.
Documented attack patterns abuse exactly the kind of access hwp_set_font gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and HWP MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for hwp_set_font:
{
"version": "1",
"default": "deny",
"tools": {
"hwp_set_font": {
"limits": [
{
"counter": "hwp_set_font_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}hwp_set_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.
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Set font properties for selected text. It is categorised as a Write tool in the HWP MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the HWP MCP Server MCP server in PolicyLayer and add a rule for hwp_set_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 HWP MCP Server. Nothing to install.
hwp_set_font 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 hwp_set_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.
Set action: deny in the PolicyLayer policy for hwp_set_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.
hwp_set_font is provided by the HWP MCP Server MCP server (jkf87/hwp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from HWP MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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30 HWP MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.