AI agents use updateTextFile to create or update resources in Google Drive MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Google Drive MCP Server environment.
This tool creates or modifies data reversibly by updating file content. It does not delete or permanently destroy data (Destructive), execute arbitrary code (Execute), move money (Financial), or merely read data (Read). The severity is medium because an AI agent could modify important documents, but the operation is reversible through version history or re-upload.
From the tool's definition Tool name 'updateTextFile' and description 'Update an existing text or markdown file' indicate modification of existing data. The verb 'Update' and the scope limited to 'text or markdown file' (not deletion) clearly place this in the Write category.
Documented attack patterns abuse exactly the kind of access updateTextFile gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Google Drive MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for updateTextFile:
{
"version": "1",
"default": "deny",
"tools": {
"updateTextFile": {
"limits": [
{
"counter": "updatetextfile_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}updateTextFile stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Update an existing text or markdown file. It is categorised as a Write tool in the Google Drive MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Google Drive MCP Server MCP server in PolicyLayer and add a rule for updateTextFile: 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 Drive MCP Server. Nothing to install.
updateTextFile is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the updateTextFile 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 updateTextFile. 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.
updateTextFile is provided by the Google Drive MCP Server MCP server (piotr-agier/google-drive-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 107 Google Drive MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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107 Google Drive MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.