AI agents call calculate_statistics to retrieve information from Libreoffice without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The name implies a read-only analytical operation — computing statistics from existing data without modifying it. However, the empty description lowers confidence significantly. Given the server context (LibreOffice documents, data analysis), this is most likely a read/query operation with no side effects. Severity is low as misuse would at worst expose document data.
From the tool's definition Tool name 'calculate_statistics' suggests reading/querying data to compute statistics; description is empty and uninformative.
Documented attack patterns abuse exactly the kind of access calculate_statistics gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Libreoffice, and nothing reaches the server without passing your rules. This is the rule we recommend for calculate_statistics:
{
"version": "1",
"default": "deny",
"tools": {
"calculate_statistics": {}
}
}calculate_statistics is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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calculate_statistics. It is categorised as a Read tool in the Libreoffice MCP Server, which means it retrieves data without modifying state.
Register the Libreoffice MCP server in PolicyLayer and add a rule for calculate_statistics: 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 Libreoffice. Nothing to install.
calculate_statistics is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the calculate_statistics 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 calculate_statistics. 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.
calculate_statistics is provided by the Libreoffice MCP server (waterpistolai/libreoffice-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Libreoffice, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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24 Libreoffice tools catalogued and risk-classified — across an index of 43,000+ MCP servers.