This record as markdown: /tools/kiln/discover-printers.md
What discover_printers does on Kiln
AI agents call discover_printers to retrieve information from Kiln without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why discover_printers is rated Low
Discovery and enumeration operations that retrieve device information are Read-category tools. They have no side effects and pose minimal risk even if invoked maliciously—an agent would simply learn what printers are available.
From the tool's definition Tool name 'discover_printers' indicates discovery/enumeration of printer devices. The empty description provides no contradictory evidence, and the name follows standard Read-category patterns (discover, list, find).
Attacks that exploit this kind of access
The rule that runs discover_printers 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 discover_printers, this is the rule to start with:
discover_printers is read-only, so it stays allowed. 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 discover_printers call is checked against it from then on.
Questions about discover_printers
discover_printers is a read tool on the Kiln MCP server. 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 discover_printers: 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.
discover_printers 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 discover_printers 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 discover_printers. 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.
discover_printers 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.
More on Kiln, and thousands of servers like it.
This server
Across the catalogue