Capture component tree. Compact text output. uid = testID or path for tap/swipe. Use interactive=true for minimal token usage.
AI agents call take_snapshot to retrieve information from React Native without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The take_snapshot tool retrieves and displays the current component tree structure of a React Native app. It has no side effects, does not modify application state, does not execute code with variable outcomes, and does not destroy or move data. It is purely informational - a snapshot capture for inspection purposes.
From the tool's definition Tool description states 'Capture component tree' with 'Compact text output' - this is a retrieval operation that queries the current state of UI components without modifying, deleting, or executing external operations.
Attacks that exploit this kind of access
Capture component tree. Compact text output. uid = testID or path for tap/swipe. Use interactive=true for minimal token usage. It is categorised as a Read tool in the React Native MCP Server, which means it retrieves data without modifying state.
Register the React Native MCP server in PolicyLayer and add a rule for take_snapshot: 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 React Native. Nothing to install.
take_snapshot 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 take_snapshot 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 take_snapshot. 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.
take_snapshot is provided by the React Native MCP server (@ohah/react-native-mcp-server). 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.
Teams ship this data inside their own products. See what a licence covers →