analyze_json_from_url

THE RISK

Low Risk

Why analyze_json_from_url needs a policy

This tool retrieves JSON from a URL and performs structural analysis to inform schema generation. There are no side effects, data modifications, deletions, or code execution. The only minor risk is that fetching from an untrusted URL could trigger SSRF or expose the server's network position, but the tool itself is fundamentally a read operation with low blast radius if misused by an AI agent.

From the tool's definition Tool description states 'Fetch JSON data from a URL and analyze its structure' — it retrieves and examines data without modifying, deleting, or executing arbitrary code. The verb 'fetch' and 'analyze' indicate read-only operations.

Documented attack patterns abuse exactly the kind of access analyze_json_from_url gives an agent:

POLICY

How to control analyze_json_from_url

PolicyLayer is an MCP gateway — it sits between your AI agents and Searchcraft MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for analyze_json_from_url:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "analyze_json_from_url": {}
  }
}

analyze_json_from_url is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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FAQ

Questions about analyze_json_from_url

What does the analyze_json_from_url tool do? +

Fetch JSON data from a URL and analyze its structure to understand field types and patterns for Searchcraft index schema generation. It is categorised as a Read tool in the Searchcraft MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on analyze_json_from_url? +

Register the Searchcraft MCP Server MCP server in PolicyLayer and add a rule for analyze_json_from_url: 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 Searchcraft MCP Server. Nothing to install.

What risk level is analyze_json_from_url? +

analyze_json_from_url is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit analyze_json_from_url? +

Yes. Add a rate_limit block to the analyze_json_from_url 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.

How do I block analyze_json_from_url completely? +

Set action: deny in the PolicyLayer policy for analyze_json_from_url. 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.

What MCP server provides analyze_json_from_url? +

analyze_json_from_url is provided by the Searchcraft MCP Server MCP server (searchcraft-inc/searchcraft-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Searchcraft MCP Server tool call.

Start from Searchcraft MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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