smartsheet_download_attachment

THE RISK

Low Risk

Why smartsheet_download_attachment needs a policy

Downloading an attachment is a read-only operation that retrieves data from Smartsheet without any side effects or modifications to the system. While attachment metadata and file content may contain sensitive information depending on access controls, the tool itself performs no destructive, executable, or data-modifying actions.

From the tool's definition Tool name 'smartsheet_download_attachment' and description 'Download a specific attachment' indicate retrieval of existing data without modification, creation, deletion, or execution of operations.

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

POLICY

How to control smartsheet_download_attachment

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "smartsheet_download_attachment": {}
  }
}

smartsheet_download_attachment is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Smartsheet MCP Server tools

Destructive smartsheet_delete Delete rows from a Smartsheet Destructive smartsheet_delete_attachment Delete an attachment from a sheet Destructive smartsheet_delete_column Delete a column from a Smartsheet Destructive smartsheet_delete_comment Delete a specific comment from a discussion Execute cancel_batch_analysis Cancel a running batch analysis job Execute start_batch_analysis Start a batch analysis job using Azure OpenAI Write create_sheet_in_workspace Create a sheet in a workspace Write create_workspace Create a new workspace

All 34 Smartsheet MCP Server tools →

Read 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.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about smartsheet_download_attachment

What does the smartsheet_download_attachment tool do? +

Download a specific attachment. It is categorised as a Read tool in the Smartsheet MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on smartsheet_download_attachment? +

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

smartsheet_download_attachment is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit smartsheet_download_attachment? +

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

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

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

Enforce policy on every Smartsheet MCP Server tool call.

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

CHECK YOUR STACK →