Score an accessibility-enriched iOS element snapshot — missing accessibilityLabel/value/traits, sub-44pt tap targets, per-text WCAG contrast, Dynamic Type clipping, and VoiceOver reading order. Provide {elements:[{label,value,hint,traits,role,rect,fontPt,fgColor,bgColor,dynamicTypeClipped}],viewp...
AI agents call audit_ios_a11y to retrieve information from Raven without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
options | object | — | |
elements | array | Yes | |
viewport | object | Yes |
Parameters from the server's own tool schema.
This tool performs read-only analysis and assessment of iOS accessibility attributes and layout properties. It captures and scores design data (labels, contrast ratios, tap targets, Dynamic Type behavior) without creating, modifying, deleting, or executing any operations. The output is diagnostic information used for design quality assurance.
From the tool's definition Tool description specifies scoring and auditing functions: 'Score an accessibility-enriched iOS element snapshot', 'Provide {elements:[...]},viewport}'.
Risk signalsHigh parameter count (20 properties)
Attacks that exploit this kind of access
Score an accessibility-enriched iOS element snapshot — missing accessibilityLabel/value/traits, sub-44pt tap targets, per-text WCAG contrast, Dynamic Type clipping, and VoiceOver reading order. Provide {elements:[{label,value,hint,traits,role,rect,fontPt,fgColor,bgColor,dynamicTypeClipped}],viewport}. Capture via the AccessibilitySnapshot XCUITest / ios-capture harness. It is categorised as a Read tool in the Raven MCP Server, which means it retrieves data without modifying state.
audit_ios_a11y accepts 3 parameters: options, elements, viewport. Required: elements, viewport. The full parameter table on this page comes from the server's own tool schema.
Register the Raven MCP server in PolicyLayer and add a rule for audit_ios_a11y: 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 Raven. Nothing to install.
audit_ios_a11y 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 audit_ios_a11y 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 audit_ios_a11y. 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.
audit_ios_a11y is provided by the Raven MCP server (raven-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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