share_sheet · Smartsheet MCP Server MCP: Risk & Policy

WHAT IT DOES

What share_sheet does on Smartsheet MCP Server

AI agents use share_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 share_sheet needs a policy

Sharing a sheet grants new access permissions to users or groups, which is a reversible write/modification of access control settings. This is high severity because an AI agent misusing this tool could expose sensitive data to unauthorized users by granting unintended access.

From the tool's definition 'Shares a sheet with users or groups' — grants access permissions to a resource

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

share_sheet Rate-limited

share_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": {
    "share_sheet": {
      "limits": [
        {
          "counter": "share_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 share_sheet

What does the share_sheet tool do? +

Shares a sheet with users or groups. 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 share_sheet? +

Register the Smartsheet MCP Server MCP server in PolicyLayer and add a rule for share_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 share_sheet? +

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

Can I rate-limit share_sheet? +

Yes. Add a rate_limit block to the share_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 share_sheet completely? +

Set action: deny in the PolicyLayer policy for share_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 share_sheet? +

share_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.

// THE FULL RECORD

share_sheet is one line of Smartsheet MCP Server's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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