This record as markdown: /tools/kiln/issue-preview-token.md
What issue_preview_token does on Kiln
AI agents use issue_preview_token to create or update resources in Kiln, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Kiln environment.
Why issue_preview_token is rated Medium
Token issuance is a write operation that creates new authentication credentials. In a 3D printer control context, preview tokens likely grant temporary access to printer resources or features. While not destructive or financial, misuse could allow an agent to create tokens for unauthorized access or escalate privileges, justifying medium severity.
From the tool's definition Tool name 'issue_preview_token' suggests creation or generation of an authentication/authorization token. The empty description limits precision, but 'issue' typically means to create or generate (e.g., 'issue a certificate', 'issue a token').
Attacks that exploit this kind of access
The rule that runs issue_preview_token safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Kiln, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For issue_preview_token, this is the rule to start with:
issue_preview_token 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Kiln, apply this rule, and every issue_preview_token call is checked against it from then on.
Questions about issue_preview_token
issue_preview_token is a write tool on the Kiln MCP server. It is categorised as a Write tool in the Kiln MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Kiln MCP server in PolicyLayer and add a rule for issue_preview_token: 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.
issue_preview_token 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 issue_preview_token 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 issue_preview_token. 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.
issue_preview_token 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.
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