sdk_cross_app_compare
AI agents call sdk_cross_app_compare to retrieve information from UI Bridge MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Based on naming convention and context of sibling analysis tools within the UI Bridge MCP server, this appears to be an inspection/comparison tool. Without execution, destruction, or side-effect capabilities evident from the name alone, it fits the Read category. Confidence is moderate due to empty description, but the SDK analysis tool family strongly suggests read-only functionality.
From the tool's definition Tool name 'sdk_cross_app_compare' suggests comparison/analysis of UI elements across applications. Description is empty, limiting certainty.
Attacks that exploit this kind of access
sdk_cross_app_compare. It is categorised as a Read tool in the UI Bridge MCP MCP Server, which means it retrieves data without modifying state.
Register the UI Bridge MCP server in PolicyLayer and add a rule for sdk_cross_app_compare: 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 UI Bridge MCP. Nothing to install.
sdk_cross_app_compare 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 sdk_cross_app_compare 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 sdk_cross_app_compare. 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.
sdk_cross_app_compare is provided by the UI Bridge MCP server (qontinui/ui-bridge-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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