AI agents call list_design_versions to retrieve information from Kiln without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name strongly suggests listing/retrieving design versions in a 3D printer control context. This is a non-destructive query operation with no side effects. The empty description reduces confidence slightly, but the naming convention and context (sibling tools involve explicit Write/Execute/Destructive actions like add_*, activate_*, ams_status) confirm this is a read-only operation.
From the tool's definition Tool name 'list_design_versions' indicates a retrieval operation that queries available design versions without modification. The 'list' prefix is characteristic of Read operations (e.g., list, get, fetch).
Attacks that exploit this kind of access
list_design_versions. It is categorised as a Read tool in the Kiln MCP Server, which means it retrieves data without modifying state.
Register the Kiln MCP server in PolicyLayer and add a rule for list_design_versions: 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 Kiln. Nothing to install.
list_design_versions 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_design_versions 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_design_versions. 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_design_versions is provided by the Kiln MCP server (codeofaxel/Kiln). 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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