drive_write_file
Write/overwrite one file in a drive (ETag-safe: pass ifMatch to assert the version you read, otherwise the current version is used automatically).
This record as markdown: /tools/ai-dataecho-mcp/drive-write-file.md
What drive_write_file does on Mcp
AI agents use drive_write_file to create or update resources in Mcp, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
path | string | Yes | Destination path in the drive |
drive | string | Yes | Drive name or drv_… id |
content | string | — | UTF-8 text content |
ifMatch | string | — | Optional ETag precondition |
contentType | string | — | Optional MIME type |
contentBase64 | string | — | Base64 content for binary files |
Parameters from the server's own tool schema.
Why drive_write_file is rated Medium
The tool modifies data reversibly by writing or overwriting files in a drive system. While ETag-safe version control is present to prevent accidental conflicts, the operation remains reversible (files can be re-written with prior content if needed). This is classic Write category behavior.
From the tool's definition Tool description explicitly states 'Write/overwrite one file in a drive' with version control via ETag. This is a create/modify operation on persistent storage.
Risk signalsAccepts file system path (path) · Accepts raw HTML/template content (content)
Attacks that exploit this kind of access
The rule that runs drive_write_file safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For drive_write_file, this is the rule to start with:
drive_write_file 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Mcp, apply this rule, and every drive_write_file call is checked against it from then on.
Questions about drive_write_file
Write/overwrite one file in a drive (ETag-safe: pass ifMatch to assert the version you read, otherwise the current version is used automatically). It is categorised as a Write tool in the Mcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
drive_write_file accepts 6 parameters: path, drive, content, ifMatch, contentType, contentBase64. Required: path, drive. The full parameter table on this page comes from the server's own tool schema.
Register the MCP server in PolicyLayer and add a rule for drive_write_file: 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. Nothing to install.
drive_write_file 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 drive_write_file 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 drive_write_file. 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.
drive_write_file is provided by the MCP server (https://dataecho.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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