attach_url_to_row · Smartsheet MCP Server MCP: Risk & Policy

WHAT IT DOES

What attach_url_to_row does on Smartsheet MCP Server

AI agents use attach_url_to_row 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_row needs a policy

Attaching a URL to a row is a reversible modification operation that creates or updates metadata associated with a row. This fits the Write category (creates or modifies data reversibly) rather than Read (which would only retrieve data) or higher-severity categories. The blast radius is limited to attachment metadata on a single row, making severity low.

From the tool's definition Tool description states it 'Attaches a URL... to a specific row', which creates/modifies data in Smartsheet reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

attach_url_to_row Rate-limited

attach_url_to_row 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_row": {
      "limits": [
        {
          "counter": "attach_url_to_row_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_row

What does the attach_url_to_row tool do? +

Attaches a URL (link, Google Drive, Dropbox, etc.) to a specific row. 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_row? +

Register the Smartsheet MCP Server MCP server in PolicyLayer and add a rule for attach_url_to_row: 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_row? +

attach_url_to_row 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_row? +

Yes. Add a rate_limit block to the attach_url_to_row 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_row completely? +

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

attach_url_to_row 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.