read_sheet_values

Read values from a specific range in a Google Sheet

SERVERVaultAssist SOURCE3xcaffeine/mcp-server

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/3xcaffeine-mcp-server/read-sheet-values.md

WHAT IT DOES

What read_sheet_values does on VaultAssist

AI agents call read_sheet_values to retrieve information from VaultAssist without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why read_sheet_values is rated Low

This tool retrieves data from a Google Sheet without creating, modifying, deleting, or executing external operations. It is a pure read operation with minimal blast radius even if misused by an AI agent, as it only exposes existing data the agent is already authorized to access via OAuth 2.1.

From the tool's definition Tool name 'read_sheet_values' and description 'Read values from a specific range in a Google Sheet' explicitly indicate data retrieval with no modification or deletion.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs read_sheet_values safely

PolicyLayer is an MCP gateway: it sits between your AI agents and VaultAssist, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For read_sheet_values, this is the rule to start with:

read_sheet_values Allowed

read_sheet_values is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "read_sheet_values": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect VaultAssist, apply this rule, and every read_sheet_values call is checked against it from then on.

FAQ

Questions about read_sheet_values

What does the read_sheet_values tool do? +

Read values from a specific range in a Google Sheet. It is categorised as a Read tool in the VaultAssist MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on read_sheet_values? +

Register the VaultAssist MCP server in PolicyLayer and add a rule for read_sheet_values: 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.

What risk level is read_sheet_values? +

read_sheet_values is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit read_sheet_values? +

Yes. Add a rate_limit block to the read_sheet_values 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.

How do I block read_sheet_values completely? +

Set action: deny in the PolicyLayer policy for read_sheet_values. 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.

What MCP server provides read_sheet_values? +

read_sheet_values 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.

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