Check HTML/CSS against brand rules — catches off-brand colors, wrong fonts, missing logo, and anti-pattern violations (drop shadows, gradients, etc.). Pass an HTML string or file path. Mode 'check' (default) runs all compliance checks and returns pass/warn/fail per rule. Mode 'rules' lists all ac...
Accepts raw HTML/template content (html)
Part of the Brandcode MCP MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents may call brand_preflight to permanently remove or destroy resources in Brandcode MCP. Without a policy, an autonomous agent could delete critical data in a loop with no way to undo the damage. Intercept blocks destructive tools by default and requires explicit human approval before enabling them.
Without a policy, an AI agent could call brand_preflight in a loop, permanently destroying resources in Brandcode MCP. There is no undo for destructive operations. Intercept blocks this tool by default and only allows it when a human explicitly approves the action.
Destructive tools permanently remove data. Block by default. Only enable with explicit approval workflows.
tools:
brand_preflight:
rules:
- action: deny
reason: "Blocked by default — enable with approval"See the full Brandcode MCP policy for all 42 tools.
Agents calling destructive-class tools like brand_preflight have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Destructive risk category across the catalogue. The same policy patterns (deny, require_approval) apply to each.
brand_preflight is one of the critical-risk operations in Brandcode MCP. For the full severity-focused view — only the critical-risk tools with their recommended policies — see the breakdown for this server, or browse all critical-risk tools across every MCP server.
Check HTML/CSS against brand rules — catches off-brand colors, wrong fonts, missing logo, and anti-pattern violations (drop shadows, gradients, etc.). Pass an HTML string or file path. Mode 'check' (default) runs all compliance checks and returns pass/warn/fail per rule. Mode 'rules' lists all active preflight rules without checking content. Use after generating any visual content to validate brand compliance. Returns overall status and per-check details. NOT for scoring content copy — use brand_audit_content. NOT for brand directory validation — use brand_audit.. It is categorised as a Destructive tool in the Brandcode MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Add a rule in your Intercept YAML policy under the tools section for brand_preflight. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Brandcode MCP MCP server.
brand_preflight is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the brand_preflight rule in your Intercept 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 Intercept policy for brand_preflight. 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.
brand_preflight is provided by the Brandcode MCP MCP server (@brandsystem/mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept