Check the health of the React Native development environment: detected OS, iOS/Android toolchains, Metro status and project info. Call this first when something is failing or before device/build operations.
AI agents call doctor to retrieve information from React Native Dev without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and reports on the state of the development environment (OS, toolchains, Metro status, project info). It has no side effects and does not modify, execute, or delete anything. It's a diagnostic/inspection tool analogous to 'react-native doctor'.
From the tool's definition "Check the health of the React Native development environment: detected OS, iOS/Android toolchains, Metro status and project info"
Attacks that exploit this kind of access
Check the health of the React Native development environment: detected OS, iOS/Android toolchains, Metro status and project info. Call this first when something is failing or before device/build operations. It is categorised as a Read tool in the React Native Dev MCP Server, which means it retrieves data without modifying state.
Register the React Native Dev MCP server in PolicyLayer and add a rule for doctor: 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 Dev. Nothing to install.
doctor 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 doctor 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 doctor. 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.
doctor is provided by the React Native Dev MCP server (luizhbesper/react-native-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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