Deletes summary fields from a sheet
AI agents call delete_summary_fields to permanently remove resources in Smartsheet MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool performs an irreversible deletion operation on sheet summary fields. Deletion is the defining characteristic of the Destructive category. While the scope is limited to summary fields (not entire sheets or rows), the action cannot be undone without manual recovery or backups. High severity reflects the potential data loss impact if misused by an AI agent.
From the tool's definition Tool name is 'delete_summary_fields' and description states it 'Deletes summary fields from a sheet'. The verb 'deletes' indicates irreversible removal of data.
Attacks that exploit this kind of access
Deletes summary fields from a sheet. It is categorised as a Destructive tool in the Smartsheet MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Smartsheet MCP Server MCP server in PolicyLayer and add a rule for delete_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.
delete_summary_fields is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the delete_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.
Set action: deny in the PolicyLayer policy for delete_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.
delete_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.
Every MCP server has a record like this.
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