Copy values from one document/sheet/table range to another. Both documents must be open. Copies values only (not formulas or formatting).
AI agents use numbers_copy_range to create or update resources in Iwork — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Iwork environment.
This tool modifies data by copying values between ranges in Numbers spreadsheets. While reversible (not destructive), it constitutes a write operation that changes spreadsheet contents. Severity is medium because misuse could overwrite important data across multiple ranges, though the operation is reversible and limited to copying values rather than executing code or deleting data.
From the tool's definition Tool description states it "Copy values from one document/sheet/table range to another" and "Copies values only (not formulas or formatting)," indicating data modification across spreadsheet ranges.
Documented attack patterns abuse exactly the kind of access numbers_copy_range gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Iwork, and nothing reaches the server without passing your rules. This is the rule we recommend for numbers_copy_range:
{
"version": "1",
"default": "deny",
"tools": {
"numbers_copy_range": {
"limits": [
{
"counter": "numbers_copy_range_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}numbers_copy_range 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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Copy values from one document/sheet/table range to another. Both documents must be open. Copies values only (not formulas or formatting). It is categorised as a Write tool in the Iwork MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Iwork MCP server in PolicyLayer and add a rule for numbers_copy_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 Iwork. Nothing to install.
numbers_copy_range 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 numbers_copy_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 numbers_copy_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.
numbers_copy_range is provided by the Iwork MCP server (reichenbach/iwork_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Iwork, 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.
114 Iwork tools catalogued and risk-classified — across an index of 43,000+ MCP servers.