AI agents call onui_list_pages to retrieve information from onUI without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about pages with annotations from storage. It performs a simple enumeration/listing without modifying, deleting, or executing any operations. The action is informational only, making it a Read category tool with low severity since exposing a list of annotated pages poses minimal security risk.
From the tool's definition Tool name 'list_pages' and description 'List pages that have onUI annotations in the local store' indicate a read-only query operation with no data modification or side effects.
Documented attack patterns abuse exactly the kind of access onui_list_pages gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and onUI, and nothing reaches the server without passing your rules. This is the rule we recommend for onui_list_pages:
{
"version": "1",
"default": "deny",
"tools": {
"onui_list_pages": {}
}
}onui_list_pages is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
List pages that have onUI annotations in the local store. It is categorised as a Read tool in the onUI MCP Server, which means it retrieves data without modifying state.
Register the onUI MCP server in PolicyLayer and add a rule for onui_list_pages: 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 onUI. Nothing to install.
onui_list_pages 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 onui_list_pages 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 onui_list_pages. 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.
onui_list_pages is provided by the onUI MCP server (onllm-dev/onui). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 onUI tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
8 onUI tools catalogued and risk-classified — across an index of 42,500+ MCP servers.