add_summary_fields · Smartsheet MCP Server MCP

WHAT IT DOES

What add_summary_fields does on Smartsheet MCP Server

AI agents use add_summary_fields 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 add_summary_fields needs a policy

This tool creates or modifies sheet structure by adding summary fields, which is a reversible Write operation. It does not delete data (not Destructive), execute arbitrary code (not Execute), involve financial transactions (not Financial), or merely retrieve information (not Read).

From the tool's definition Tool name 'add_summary_fields' and description 'Adds new summary fields to a sheet' indicate creation of new fields/schema modifications to existing sheets.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_summary_fields Rate-limited

add_summary_fields 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": {
    "add_summary_fields": {
      "limits": [
        {
          "counter": "add_summary_fields_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 add_summary_fields

What does the add_summary_fields tool do? +

Adds new summary fields 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 add_summary_fields? +

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

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

Can I rate-limit add_summary_fields? +

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

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

add_summary_fields 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

add_summary_fields 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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