Full pattern documentation as Markdown (requirements, keyboard, ARIA, etc.) plus example summaries with live URLs.
AI agents call apg_get_pattern to retrieve information from Accessibility without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves structured information (accessibility patterns, documentation, and URLs) with no side effects. It is purely informational, similar to a documentation lookup or reference fetch. No data is created, modified, deleted, or executed.
From the tool's definition Tool retrieves and returns documentation: 'Full pattern documentation as Markdown' and 'example summaries with live URLs'. No modification, deletion, or execution of external operations described.
Attacks that exploit this kind of access
Full pattern documentation as Markdown (requirements, keyboard, ARIA, etc.) plus example summaries with live URLs. It is categorised as a Read tool in the Accessibility MCP Server, which means it retrieves data without modifying state.
Register the Accessibility MCP server in PolicyLayer and add a rule for apg_get_pattern: 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. Nothing to install.
apg_get_pattern 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 apg_get_pattern 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 apg_get_pattern. 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.
apg_get_pattern is provided by the Accessibility MCP server (nicolasgalvez/accessibility-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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