Download a file from Synology Drive and return it as base64-encoded content with metadata.
AI agents call drive_download_file to retrieve information from Synology Office without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves file content from storage and returns it encoded. It has no side effects on the file system—no creation, modification, deletion, or execution occurs. The data returned depends only on what already exists and the user's read permissions. Blast radius is minimal: an agent could access sensitive files it has permission to read, but cannot alter or destroy data. Classified as Read.
From the tool's definition Tool description states 'Download a file from Synology Drive and return it as base64-encoded content with metadata.' Downloads retrieve and return data without modification or deletion.
Documented attack patterns abuse exactly the kind of access drive_download_file gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Synology Office, and nothing reaches the server without passing your rules. This is the rule we recommend for drive_download_file:
{
"version": "1",
"default": "deny",
"tools": {
"drive_download_file": {}
}
}drive_download_file is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Download a file from Synology Drive and return it as base64-encoded content with metadata. It is categorised as a Read tool in the Synology Office MCP Server, which means it retrieves data without modifying state.
Register the Synology Office MCP server in PolicyLayer and add a rule for drive_download_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 Synology Office. Nothing to install.
drive_download_file 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 drive_download_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_download_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_download_file is provided by the Synology Office MCP server (vocweb/synology-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Synology Office, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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39 Synology Office tools catalogued and risk-classified — across an index of 43,000+ MCP servers.