Get full structure of a spreadsheet: sheets, named ranges, protected ranges.
AI agents call sheets_describe to retrieve information from Gworkspace without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries spreadsheet structure without creating, modifying, deleting, or executing anything. It has no side effects and poses minimal security risk even if misused by an agent, as it only exposes existing schema information.
From the tool's definition Tool name 'sheets_describe' and description 'Get full structure of a spreadsheet' indicates a retrieval/query operation with no modification of data. The action is purely informational—extracting metadata about sheets, named ranges, and protected ranges.
Attacks that exploit this kind of access
Get full structure of a spreadsheet: sheets, named ranges, protected ranges. It is categorised as a Read tool in the Gworkspace MCP Server, which means it retrieves data without modifying state.
Register the Gworkspace MCP server in PolicyLayer and add a rule for sheets_describe: 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 Gworkspace. Nothing to install.
sheets_describe 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 sheets_describe 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 sheets_describe. 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.
sheets_describe is provided by the Gworkspace MCP server (leoonic/gworkspace-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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