Apply a named table style (e.g. TableGrid, LightShading-Accent1) to a table.
AI agents use set_table_style 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.
This tool creates or modifies document data reversibly—applying a table style changes the table's appearance and structure properties but does not delete content or execute arbitrary code. The modification is reversible (a different style can be applied). While it affects document structure, it is not destructive (no deletion), not execute-level (no code execution), and not financial.
From the tool's definition The tool 'set_table_style' modifies a table's formatting by applying a named style. The description explicitly states it will 'Apply a named table style' to a table, which is a reversible modification to document content.
Documented attack patterns abuse exactly the kind of access set_table_style gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Docx, and nothing reaches the server without passing your rules. This is the rule we recommend for set_table_style:
{
"version": "1",
"default": "deny",
"tools": {
"set_table_style": {
"limits": [
{
"counter": "set_table_style_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}set_table_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 a named table style (e.g. TableGrid, LightShading-Accent1) to a table. 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.
Register the Docx MCP server in PolicyLayer and add a rule for set_table_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 Docx. Nothing to install.
set_table_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 set_table_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 set_table_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.
set_table_style 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.
Start from Docx, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
219 Docx tools catalogued and risk-classified — across an index of 43,000+ MCP servers.