List all APG pattern ids and titles. Optional filter matches id or title (case-insensitive substring).
AI agents call apg_list_patterns 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 is a straightforward data retrieval operation. It queries a static catalog of accessibility patterns and optionally filters results. No data is created, modified, or deleted. No external code is executed. Blast radius if misused is minimal—an AI agent cannot cause harm by over-querying pattern metadata.
From the tool's definition Tool performs 'List all APG pattern ids and titles' with optional filtering. No side effects—purely retrieves and queries accessibility pattern metadata. The description contains no language suggesting mutation, deletion, or external execution.
Attacks that exploit this kind of access
List all APG pattern ids and titles. Optional filter matches id or title (case-insensitive substring). 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_list_patterns: 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_list_patterns 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_list_patterns 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_list_patterns. 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_list_patterns 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.
Teams ship this data inside their own products. See what a licence covers →