List spreadsheets from Google Drive that the user has access to
AI agents call list_spreadsheets to retrieve information from VaultAssist without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns a list of spreadsheet resources the authenticated user can access. It retrieves data without side effects, creating no modifications, deletions, or external operations. The blast radius of misuse is minimal — an agent could discover what spreadsheets exist but cannot alter, delete, or execute actions on them. Classified as Read with low severity.
From the tool's definition Tool name is 'list_spreadsheets' and description states it 'List spreadsheets from Google Drive that the user has access to' — a pure retrieval operation with no modification or deletion.
Documented attack patterns abuse exactly the kind of access list_spreadsheets gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and VaultAssist, and nothing reaches the server without passing your rules. This is the rule we recommend for list_spreadsheets:
{
"version": "1",
"default": "deny",
"tools": {
"list_spreadsheets": {}
}
}list_spreadsheets is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List spreadsheets from Google Drive that the user has access to. It is categorised as a Read tool in the VaultAssist MCP Server, which means it retrieves data without modifying state.
Register the VaultAssist MCP server in PolicyLayer and add a rule for list_spreadsheets: 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 VaultAssist. Nothing to install.
list_spreadsheets 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 list_spreadsheets 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 list_spreadsheets. 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.
list_spreadsheets is provided by the VaultAssist MCP server (3xcaffeine/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from VaultAssist, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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79 VaultAssist tools catalogued and risk-classified — across an index of 43,000+ MCP servers.