Delete all annotations for a specific page URL.
AI agents call onui_clear_page_annotations to permanently remove resources in onUI — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly removes all annotations associated with a page in one operation. Although annotations are typically less critical than source data, the bulk deletion without per-item confirmation and inability to undo makes this Destructive rather than Write. The high severity reflects the potential loss of accumulated UI markup/documentation work for an entire page.
From the tool's definition Tool name contains 'clear' and description states 'Delete all annotations for a specific page URL' — a bulk irreversible deletion operation.
Documented attack patterns abuse exactly the kind of access onui_clear_page_annotations 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_clear_page_annotations:
{
"version": "1",
"default": "deny",
"hide": [
"onui_clear_page_annotations"
]
}onui_clear_page_annotations disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Delete all annotations for a specific page URL. It is categorised as a Destructive tool in the onUI MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the onUI MCP server in PolicyLayer and add a rule for onui_clear_page_annotations: 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_clear_page_annotations is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the onui_clear_page_annotations 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_clear_page_annotations. 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_clear_page_annotations 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.