Find and replace text in an HWPX file. v0.2: only .hwpx is supported as input/output. Args: file_path, old_text, new_text, output_path (optional).
AI agents use replace_hwp_text 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.
While the tool modifies a document, replacement operations are reversible—users can undo or re-replace text. This qualifies as Write rather than Destructive. However, the severity is high because an AI agent could replace significant content across a document without proper safeguards, potentially altering critical information.
From the tool's definition Tool description states 'Find and replace text in an HWPX file' with arguments for old_text and new_text, indicating modification of document content. The operation is reversible (text can be replaced back), distinguishing it from destructive operations.
Documented attack patterns abuse exactly the kind of access replace_hwp_text 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 replace_hwp_text:
{
"version": "1",
"default": "deny",
"tools": {
"replace_hwp_text": {
"limits": [
{
"counter": "replace_hwp_text_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}replace_hwp_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.
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Find and replace text in an HWPX file. v0.2: only .hwpx is supported as input/output. Args: file_path, old_text, new_text, output_path (optional). 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 replace_hwp_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 Hwp. Nothing to install.
replace_hwp_text 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 replace_hwp_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.
Set action: deny in the PolicyLayer policy for replace_hwp_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.
replace_hwp_text 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.