Get revision history of a file
AI agents call get_file_revisions to retrieve information from Mcp Google Drive without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves revision history, which is a read-only operation with no side effects. It does not create, modify, delete, or execute anything. The blast radius of misuse is minimal — an attacker could enumerate file versions but cannot alter or destroy content. Classified as Read with low severity.
From the tool's definition Tool name is 'get_file_revisions' and description states it 'Get revision history of a file' — this is a query operation that retrieves historical metadata without modifying or deleting data.
Attacks that exploit this kind of access
Get revision history of a file. It is categorised as a Read tool in the Mcp Google Drive MCP Server, which means it retrieves data without modifying state.
Register the Mcp Google Drive MCP server in PolicyLayer and add a rule for get_file_revisions: 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 Mcp Google Drive. Nothing to install.
get_file_revisions 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_file_revisions 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_file_revisions. 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_file_revisions is provided by the Mcp Google Drive MCP server (longtran2404/mcp-google-drive). 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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