Clear the contents of a cell range in a worksheet (formatting is preserved)
AI agents call excel_clear_range to permanently remove resources in Sage MCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Clearing cell contents is an irreversible destructive action — the data in the specified range is permanently removed. Although formatting is preserved, the actual data cannot be recovered once cleared (no undo mechanism in an API context). This warrants a Destructive classification with high severity given the potential blast radius of wiping large ranges of spreadsheet data.
From the tool's definition Clear the contents of a cell range in a worksheet
Documented attack patterns abuse exactly the kind of access excel_clear_range gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Sage MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for excel_clear_range:
{
"version": "1",
"default": "deny",
"hide": [
"excel_clear_range"
]
}excel_clear_range disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Clear the contents of a cell range in a worksheet (formatting is preserved). It is categorised as a Destructive tool in the Sage MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Sage MCP server in PolicyLayer and add a rule for excel_clear_range: 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 Sage MCP. Nothing to install.
excel_clear_range 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 excel_clear_range 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 excel_clear_range. 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.
excel_clear_range is provided by the Sage MCP server (sagemcp/sagemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 359 Sage MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
359 Sage MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.