AI agents use smartsheet_add_column 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.
Adding a column modifies the sheet structure reversibly—it creates a new field but does not delete data or execute arbitrary code. The change is reversible (the column can be removed). This is a classic Write operation.
From the tool's definition Tool name 'smartsheet_add_column' and description 'Add a new column to a Smartsheet' indicate creation of new schema/structure within a spreadsheet document.
Documented attack patterns abuse exactly the kind of access smartsheet_add_column gives an agent:
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_add_column:
{
"version": "1",
"default": "deny",
"tools": {
"smartsheet_add_column": {
"limits": [
{
"counter": "smartsheet_add_column_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}smartsheet_add_column 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.
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Add a new column to a Smartsheet. 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.
Register the Smartsheet MCP Server MCP server in PolicyLayer and add a rule for smartsheet_add_column: 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.
smartsheet_add_column is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the smartsheet_add_column 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.
Set action: deny in the PolicyLayer policy for smartsheet_add_column. 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.
smartsheet_add_column 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.
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.
Free to start. No card required.
34 Smartsheet MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.