import_csv_to_existing_sheet · Smartsheet MCP Server MCP

WHAT IT DOES

What import_csv_to_existing_sheet does on Smartsheet MCP Server

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

WHY IT NEEDS A POLICY

Why import_csv_to_existing_sheet needs a policy

This tool modifies a sheet by adding new rows, making it a Write operation. It is not Destructive (rows can be deleted), not Execute (it doesn't run arbitrary code), and not Financial. Severity is medium because bulk CSV imports could impact data integrity if malformed data is ingested, but the operation is reversible. Confidence is high given the clear functional description.

From the tool's definition The tool description states it 'Imports CSV content as new rows in an existing sheet', which creates new data records in the sheet. This is a reversible data modification operation—the imported rows can be deleted afterward.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

import_csv_to_existing_sheet Rate-limited

import_csv_to_existing_sheet 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": {
    "import_csv_to_existing_sheet": {
      "limits": [
        {
          "counter": "import_csv_to_existing_sheet_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Smartsheet MCP Server, so you can run agents against it safely.

FAQ

Questions about import_csv_to_existing_sheet

What does the import_csv_to_existing_sheet tool do? +

Imports CSV content as new rows in an existing sheet. It is categorised as a Write tool in the Smartsheet MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on import_csv_to_existing_sheet? +

Register the Smartsheet MCP Server MCP server in PolicyLayer and add a rule for import_csv_to_existing_sheet: 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 Smartsheet MCP Server. Nothing to install.

What risk level is import_csv_to_existing_sheet? +

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

Can I rate-limit import_csv_to_existing_sheet? +

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

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

import_csv_to_existing_sheet is provided by the Smartsheet MCP Server MCP server (thomaswtwrt/smar-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.