AI agents call get_cell_value 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 tool retrieves cell values from a spreadsheet without modifying data or triggering side effects. This is a read-only query operation. Though the description is empty, the name clearly indicates data retrieval. The low confidence penalty reflects the missing description, but the name itself provides sufficient clarity to categorize as Read with moderate-to-high confidence.
From the tool's definition Tool name 'get_cell_value' indicates retrieval of data from a cell in a spreadsheet. Context from sibling tools (apply_style, create_chart, calculate_statistics) suggests this is part of LibreOffice Calc operations for document interaction.
Documented attack patterns abuse exactly the kind of access get_cell_value 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 get_cell_value:
{
"version": "1",
"default": "deny",
"tools": {
"get_cell_value": {}
}
}get_cell_value is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_cell_value. 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 get_cell_value: 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.
get_cell_value 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 get_cell_value 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 get_cell_value. 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.
get_cell_value 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.