MCP Tool Reference High Risk

runAccessibilityAudit

Run WCAG accessibility audit via Lighthouse

Part of the BrowserTools MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

AgentDeskAI/browser-tools-mcp Execute

WHEN AI AGENTS USE THIS TOOL

AI agents invoke runAccessibilityAudit to trigger processes or run actions in BrowserTools. Execute operations can have side effects beyond the immediate call — triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.

WHY ENFORCE A POLICY ON RUNACCESSIBILITYAUDIT

runAccessibilityAudit can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. Intercept enforces rate limits and validates arguments to keep execution within safe bounds.

RECOMMENDED POLICY

Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.

browsertools.yaml 
tools:
  runAccessibilityAudit:
    rules:
      - action: allow
        rate_limit:
          max: 10
          window: 60
        validate:
          required_args: true

See the full BrowserTools policy for all 15 tools.

DETAILS

Tool Name

runAccessibilityAudit

Category

Execute

MCP Server

BrowserTools MCP Server

Risk Level

High

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RELATED READING

FREQUENTLY ASKED QUESTIONS

What does the runAccessibilityAudit tool do?

Run WCAG accessibility audit via Lighthouse. It is categorised as a Execute tool in the BrowserTools MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on runAccessibilityAudit?

Add a rule in your Intercept YAML policy under the tools section for runAccessibilityAudit. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the BrowserTools MCP server.

What risk level is runAccessibilityAudit?

runAccessibilityAudit is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit runAccessibilityAudit?

Yes. Add a rate_limit block to the runAccessibilityAudit 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.

How do I block runAccessibilityAudit completely?

Set action: deny in the Intercept policy for runAccessibilityAudit. 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.

What MCP server provides runAccessibilityAudit?

runAccessibilityAudit is provided by the BrowserTools MCP server (AgentDeskAI/browser-tools-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

ENFORCE POLICIES ON BROWSERTOOLS

Open source. One binary. Zero dependencies.

VIEW ON GITHUB Full BrowserTools policy →