Analyze table and list changes between snapshots. Detects added/removed rows and list items.
AI agents call sdk_structured_changes 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 examines and compares UI element states (tables, lists) across snapshots to identify structural changes. It performs data analysis and detection only, returning information about what changed without modifying, executing, or deleting anything. The action is confined to inspection and comparison, making it a Read operation with low security risk.
From the tool's definition Tool description states it 'Analyze table and list changes between snapshots' and 'Detects added/removed rows and list items' — purely observational/analytical operations with no modification of underlying data.
Attacks that exploit this kind of access
Analyze table and list changes between snapshots. Detects added/removed rows and list items. 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_structured_changes: 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_structured_changes 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_structured_changes 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_structured_changes. 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_structured_changes 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_structured_changes 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.
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