lint_schematic_cosmetic
Netlist-safe cosmetic cleanup of a .kicad_sch, applied as raw-text edits that never
This record as markdown: /tools/mixelpixx-kicad-mcp-server/lint-schematic-cosmetic.md
What lint_schematic_cosmetic does on KiCAD-MCP-Server
AI agents use lint_schematic_cosmetic to create or update resources in KiCAD-MCP-Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your KiCAD-MCP-Server environment.
Why lint_schematic_cosmetic is rated Medium
The tool modifies a schematic file (.kicad_sch) but explicitly constrains changes to cosmetic/non-functional cleanup. It creates or modifies file content reversibly (raw-text edits), making it a Write operation rather than Execute or Destructive. The incomplete description reduces confidence slightly, but 'cosmetic' and 'netlist-safe' language strongly suggests low-risk, reversible modifications.
From the tool's definition Tool description states 'cosmetic cleanup' and 'raw-text edits that never' (incomplete phrase suggests non-destructive modifications).
Attacks that exploit this kind of access
The rule that runs lint_schematic_cosmetic safely
PolicyLayer is an MCP gateway: it sits between your AI agents and KiCAD-MCP-Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For lint_schematic_cosmetic, this is the rule to start with:
lint_schematic_cosmetic 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 KiCAD-MCP-Server, apply this rule, and every lint_schematic_cosmetic call is checked against it from then on.
Questions about lint_schematic_cosmetic
Netlist-safe cosmetic cleanup of a .kicad_sch, applied as raw-text edits that never. It is categorised as a Write tool in the KiCAD-MCP-Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the KiCAD-MCP-Server MCP server in PolicyLayer and add a rule for lint_schematic_cosmetic: 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 KiCAD-MCP-Server. Nothing to install.
lint_schematic_cosmetic 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 lint_schematic_cosmetic 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 lint_schematic_cosmetic. 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.
lint_schematic_cosmetic is provided by the KiCAD-MCP-Server MCP server (mixelpixx/kicad-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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