AI agents call get-required-owned to retrieve information from Aria without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns information from the W3C WAI-ARIA specification database. It performs a read-only lookup operation (analogous to 'get-required-attributes' and other sibling 'get-' tools on the same server) that retrieves requirement metadata about parent-child role relationships. There are no side effects, data modifications, code execution, or destructive operations.
From the tool's definition Tool name 'get-required-owned' and description 'Get the required child elements for a role' indicate a query operation that retrieves specification metadata about ARIA role requirements without modifying any data.
Attacks that exploit this kind of access
Get the required child elements for a role (e.g., list requires listitem). It is categorised as a Read tool in the Aria MCP Server, which means it retrieves data without modifying state.
Register the Aria MCP server in PolicyLayer and add a rule for get-required-owned: 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 Aria. Nothing to install.
get-required-owned 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 get-required-owned 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 get-required-owned. 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.
get-required-owned is provided by the Aria MCP server (joe-watkins/aria-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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