Run accessibility tests on a URL and return violations in raw JSON format. [${configNote}]
AI agents call analyze_url_json to retrieve information from Accessibility Testing MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs passive analysis and testing—it retrieves information about accessibility compliance from a URL and returns results in JSON format. There are no side effects, data modifications, deletions, financial implications, or arbitrary code execution. The operation is non-destructive and informational, fitting the Read category (retrieves or queries data; no side effects).
From the tool's definition analyze_url_json: 'Run accessibility tests on a URL and return violations in raw JSON format.' This is a read-only operation that fetches and analyzes a remote URL, returning structured data about accessibility violations without modifying anything.
Attacks that exploit this kind of access
Run accessibility tests on a URL and return violations in raw JSON format. [${configNote}]. It is categorised as a Read tool in the Accessibility Testing MCP MCP Server, which means it retrieves data without modifying state.
Register the Accessibility Testing MCP server in PolicyLayer and add a rule for analyze_url_json: 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 Accessibility Testing MCP. Nothing to install.
analyze_url_json 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 analyze_url_json 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 analyze_url_json. 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.
analyze_url_json is provided by the Accessibility Testing MCP server (joe-watkins/accessibility-testing-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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