AI agents call get_file_download_url to retrieve information from Openai without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves file metadata (a temporary download URL) from ChatGPT storage. It does not create, modify, delete, or execute anything—it only reads and returns a URL. The temporary nature of the URL and the fact that actual file content access depends on subsequent use of that URL do not change the fundamental category of this operation, which is data retrieval with no side effects.
From the tool's definition Tool name includes 'get' and 'url'; description states 'Get a temporary download URL' which is a read operation that retrieves data (a URL) without modifying or deleting anything.
Attacks that exploit this kind of access
Get a temporary download URL for a ChatGPT file. It is categorised as a Read tool in the Openai MCP Server, which means it retrieves data without modifying state.
Register the Openai MCP server in PolicyLayer and add a rule for get_file_download_url: 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 Openai. Nothing to install.
get_file_download_url 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_download_url 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_download_url. 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_download_url is provided by the Openai MCP server (robotlearning123/gpt2agent). 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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