AI agents call list_downloads to retrieve information from Defined without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation to enumerate available downloads. The unauthenticated nature and listing functionality confirm no data is modified, deleted, or executed. The blast radius of misuse is minimal—an AI agent could at worst list downloads repeatedly, causing minor resource consumption. Categorized as Read with low severity.
From the tool's definition Tool name 'list_downloads' combined with description 'List available software downloads (unauthenticated)' indicates a query operation that retrieves information without modification or side effects.
Attacks that exploit this kind of access
List available software downloads (unauthenticated). It is categorised as a Read tool in the Defined MCP Server, which means it retrieves data without modifying state.
Register the Defined MCP server in PolicyLayer and add a rule for list_downloads: 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 Defined. Nothing to install.
list_downloads 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 list_downloads 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 list_downloads. 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.
list_downloads is provided by the Defined MCP server (quickvm/defined-mcp). 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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