Read values from an A1-notation range.
AI agents call read_range to retrieve information from Google Sheets OAuth MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data from a spreadsheet range without any side effects. It performs a simple read operation on user-owned Google Sheets data. The low severity reflects minimal blast radius—misuse would only expose data the AI already has OAuth access to read, with no ability to modify, delete, or execute operations.
From the tool's definition Tool name 'read_range' and description 'Read values from an A1-notation range' explicitly indicate data retrieval with no modification capability.
Attacks that exploit this kind of access
Read values from an A1-notation range. It is categorised as a Read tool in the Google Sheets OAuth MCP MCP Server, which means it retrieves data without modifying state.
Register the Google Sheets OAuth MCP server in PolicyLayer and add a rule for read_range: 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 Google Sheets OAuth MCP. Nothing to install.
read_range 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 read_range 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 read_range. 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.
read_range is provided by the Google Sheets OAuth MCP server (rpieterse/mcp-studio-google-sheets-oauth-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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