Create a new discussion thread on a sheet or row
AI agents use smartsheet_create_discussion 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.
This tool creates new discussion threads, which are reversible additions to sheet collaboration features. It modifies the sheet by adding content but does not delete, execute code, move financial resources, or cause irreversible changes. The blast radius is minimal—a mistaken discussion can be deleted. This falls squarely into the Write category with low severity.
From the tool's definition Tool name 'smartsheet_create_discussion' and description 'Create a new discussion thread on a sheet or row' indicate this creates new collaborative content (discussion threads) in Smartsheet.
Documented attack patterns abuse exactly the kind of access smartsheet_create_discussion 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_create_discussion:
{
"version": "1",
"default": "deny",
"tools": {
"smartsheet_create_discussion": {
"limits": [
{
"counter": "smartsheet_create_discussion_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}smartsheet_create_discussion 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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Create a new discussion thread on a sheet or 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.
Register the Smartsheet MCP Server MCP server in PolicyLayer and add a rule for smartsheet_create_discussion: 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_create_discussion 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_create_discussion 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_create_discussion. 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_create_discussion 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.
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34 Smartsheet MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.