Upload a file to Synology Drive from a base64-encoded payload. Max recommended size: 50 MB.
AI agents use drive_upload_file to create or update resources in Synology Office — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Synology Office environment.
This tool creates new files or overwrites existing ones in Synology Drive, making it a Write operation (reversible data modification). Severity is medium because uploading files could introduce malware, overwrite important documents, or fill storage quota, but the impact is limited to the user's own Drive instance without affecting financial systems, external resources, or causing irreversible destruction at the…
From the tool's definition Tool description explicitly states 'Upload a file to Synology Drive from a base64-encoded payload', which is a file creation/modification operation on a persistent storage system.
Documented attack patterns abuse exactly the kind of access drive_upload_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_upload_file:
{
"version": "1",
"default": "deny",
"tools": {
"drive_upload_file": {
"limits": [
{
"counter": "drive_upload_file_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}drive_upload_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.
Free to start. No card required.
Upload a file to Synology Drive from a base64-encoded payload. Max recommended size: 50 MB. It is categorised as a Write tool in the Synology Office MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Synology Office MCP server in PolicyLayer and add a rule for drive_upload_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_upload_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_upload_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_upload_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_upload_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.
Free to start. No card required.
39 Synology Office tools catalogued and risk-classified — across an index of 43,000+ MCP servers.