attach_url_to_sheet · Smartsheet MCP Server MCP

WHAT IT DOES

What attach_url_to_sheet does on Smartsheet MCP Server

AI agents use attach_url_to_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 attach_url_to_sheet needs a policy

This tool creates or modifies data in Smartsheet by attaching URLs to sheets. While attachments can be removed (reversible), the action constitutes a write operation that persists data changes.

From the tool's definition The tool description states it 'Attaches a URL (link, Google Drive, Dropbox, etc.) to a sheet', which creates or modifies sheet content by adding metadata/attachments. This is a reversible modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

attach_url_to_sheet Rate-limited

attach_url_to_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": {
    "attach_url_to_sheet": {
      "limits": [
        {
          "counter": "attach_url_to_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 attach_url_to_sheet

What does the attach_url_to_sheet tool do? +

Attaches a URL (link, Google Drive, Dropbox, etc.) to a 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 attach_url_to_sheet? +

Register the Smartsheet MCP Server MCP server in PolicyLayer and add a rule for attach_url_to_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 attach_url_to_sheet? +

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

Can I rate-limit attach_url_to_sheet? +

Yes. Add a rate_limit block to the attach_url_to_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 attach_url_to_sheet completely? +

Set action: deny in the PolicyLayer policy for attach_url_to_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 attach_url_to_sheet? +

attach_url_to_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.