excel_write_range

Write values to a cell range in a worksheet. Values are a 2D array where each inner array is a row.

SERVERSage MCP SOURCEsagemcp/sagemcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/sagemcp-sagemcp/excel-write-range.md

WHAT IT DOES

What excel_write_range does on Sage MCP

AI agents use excel_write_range to create or update resources in Sage MCP, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Sage MCP environment.

RISK

Why excel_write_range is rated Medium

This tool modifies data in Excel spreadsheets by writing values to cell ranges. It is categorized as Write rather than Destructive because the changes are reversible—existing values can be overwritten or changes undone. Severity is medium because an AI agent with access could modify important spreadsheet data, but the impact is contained to the affected cells and reversible.

From the tool's definition Tool name 'excel_write_range' and description 'Write values to a cell range in a worksheet' explicitly indicate data modification. The operation modifies spreadsheet cells but is reversible (can be undone or overwritten).

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs excel_write_range safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Sage MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For excel_write_range, this is the rule to start with:

excel_write_range Rate-limited

excel_write_range 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.

View as policy code

policy.json

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

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Sage MCP, apply this rule, and every excel_write_range call is checked against it from then on.

FAQ

Questions about excel_write_range

What does the excel_write_range tool do? +

Write values to a cell range in a worksheet. Values are a 2D array where each inner array is a row. It is categorised as a Write tool in the Sage 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 excel_write_range? +

Register the Sage MCP server in PolicyLayer and add a rule for excel_write_range: 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 Sage MCP. Nothing to install.

What risk level is excel_write_range? +

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

Can I rate-limit excel_write_range? +

Yes. Add a rate_limit block to the excel_write_range 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 excel_write_range completely? +

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

excel_write_range is provided by the Sage MCP server (sagemcp/sagemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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