Get a budget-aware text summary of UI changes. Summarizes appeared/disappeared/modified elements within a character budget.
AI agents call sdk_summarize_diff 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.
This tool retrieves and summarizes UI state differences (appeared/disappeared/modified elements) with no side effects, state changes, or command execution. It is purely observational—analyzing and reporting on UI changes rather than causing them. The character budget constraint confirms it is a read-only summarization utility. No data is written, deleted, or external operations triggered.
From the tool's definition Tool name 'sdk_summarize_diff' and description 'Get a budget-aware text summary of UI changes' indicates passive analysis and retrieval of UI change information without modification or execution of actions.
Attacks that exploit this kind of access
Get a budget-aware text summary of UI changes. Summarizes appeared/disappeared/modified elements within a character budget. 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_summarize_diff: 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_summarize_diff 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_summarize_diff 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_summarize_diff. 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_summarize_diff 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.
sdk_summarize_diff is one line of UI Bridge's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →