set_cells_value

THE RISK

Medium Risk

Why set_cells_value needs a policy

This tool creates or modifies table cell data reversibly. It does not delete data (that would be 'delete_table_rows'), does not execute arbitrary code, and does not involve financial transactions. Write is the appropriate category.

From the tool's definition Tool name 'set_cells_value' indicates modifying cell data in tables. Server description mentions 'data management' and 'bulk operations' on tables.

Documented attack patterns abuse exactly the kind of access set_cells_value gives an agent:

POLICY

How to control set_cells_value

PolicyLayer is an MCP gateway — it sits between your AI agents and DOCX-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for set_cells_value:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "set_cells_value": {
      "limits": [
        {
          "counter": "set_cells_value_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

set_cells_value 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.

Create a free account and register DOCX-MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More DOCX-MCP tools

Destructive delete_table Delete a table from the document. Destructive delete_table_rows Delete rows from a table. Write add_table_columns add_table_columns Write add_table_rows add_table_rows Write create_table create_table Write merge_cells merge_cells Write open_document Open or create a Word document. Write save_document Save a Word document.

All 16 DOCX-MCP tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about set_cells_value

What does the set_cells_value tool do? +

set_cells_value. It is categorised as a Write tool in the DOCX-MCP 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_cells_value? +

Register the DOCX- MCP server in PolicyLayer and add a rule for set_cells_value: 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-MCP. Nothing to install.

What risk level is set_cells_value? +

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

Can I rate-limit set_cells_value? +

Yes. Add a rate_limit block to the set_cells_value 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_cells_value completely? +

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

set_cells_value is provided by the DOCX- MCP server (rookie0x80/docx-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every DOCX-MCP tool call.

Start from DOCX-MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →