sdk_screenshot_delta
AI agents call sdk_screenshot_delta 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.
Screenshot capture and delta comparison are read-only operations that retrieve UI state information without modifying, executing, or deleting data. The tool's position among inspection-focused siblings and the absence of any action verbs (execute, delete, create) indicate a Read classification.
From the tool's definition Tool name 'sdk_screenshot_delta' suggests comparison or differential capture of UI screenshots. Empty description limits specificity, but sibling tools (sdk_annotated_screenshot, diagnose_stuck_screen, get_idle_status) indicate this server primarily performs…
Attacks that exploit this kind of access
sdk_screenshot_delta. 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_screenshot_delta: 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_screenshot_delta 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_screenshot_delta 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_screenshot_delta. 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_screenshot_delta 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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