Fast inline brand gate — check text, colors, fonts, or CSS against the compiled brand identity in under 50ms. Pass one or more inputs: text (voice violations, never-say, AI-isms), color (palette match with ΔE distance), font (typography match), css (visual anti-pattern violations). Returns pass/f...
Part of the Brandcode MCP MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents call brand_check to retrieve information from Brandcode MCP without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though brand_check only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
tools:
brand_check:
rules:
- action: allowSee the full Brandcode MCP policy for all 42 tools.
Agents calling read-class tools like brand_check have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Read risk category across the catalogue. The same policy patterns (rate-limit, allow) apply to each.
Fast inline brand gate — check text, colors, fonts, or CSS against the compiled brand identity in under 50ms. Pass one or more inputs: text (voice violations, never-say, AI-isms), color (palette match with ΔE distance), font (typography match), css (visual anti-pattern violations). Returns pass/fail with specific fixes. Call this reflexively while generating content or code, the way you'd run a linter. Requires brand_compile to have run first. NOT for deep audits — use brand_audit_content for comprehensive scoring.. It is categorised as a Read tool in the Brandcode MCP MCP Server, which means it retrieves data without modifying state.
Add a rule in your Intercept YAML policy under the tools section for brand_check. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Brandcode MCP MCP server.
brand_check 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 brand_check 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_check. 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_check 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