Infer a TypeScript interface from a sample JSON value. POST { sample, rootName? }. Handles nested objects, arrays (merged element type), and primitives; merges keys across array elements. Returns a ready-to-paste interface string.
AI agents call dev.json-to-typescript to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure analysis utility that takes JSON input and produces TypeScript type definitions. It performs no writes, deletions, external command execution, or financial transactions. The tool operates entirely on provided input to generate informational output, classifying it as a Read operation with low severity even if misused by an agent.
From the tool's definition Tool description explicitly states it 'infers' a TypeScript interface from a JSON sample and 'returns a ready-to-paste interface string' — purely data analysis/transformation with no modification of external state, no code execution, and no side effects…
Attacks that exploit this kind of access
Infer a TypeScript interface from a sample JSON value. POST { sample, rootName? }. Handles nested objects, arrays (merged element type), and primitives; merges keys across array elements. Returns a ready-to-paste interface string. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for dev.json-to-typescript: 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 Mcp. Nothing to install.
dev.json-to-typescript 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 dev.json-to-typescript 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 dev.json-to-typescript. 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.
dev.json-to-typescript is provided by the MCP server (@2sio/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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