analyze_json_from_file

THE RISK

Low Risk

Why analyze_json_from_file needs a policy

This tool retrieves and examines file contents locally without creating, modifying, deleting, or executing external operations. It is purely informational, making it a Read category tool with low severity since it accesses local files that the user has already explicitly provided.

From the tool's definition Tool description states 'Read JSON data from a local file and analyze its structure' — the verb 'read' and 'analyze' indicate data retrieval with no modification. No side effects are described.

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

POLICY

How to control analyze_json_from_file

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_file:

policy.json

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

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

Create a free account and register Searchcraft MCP Server — nothing to install.
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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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
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Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about analyze_json_from_file

What does the analyze_json_from_file tool do? +

Read JSON data from a local file 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_file? +

Register the Searchcraft MCP Server MCP server in PolicyLayer and add a rule for analyze_json_from_file: 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_file? +

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

Can I rate-limit analyze_json_from_file? +

Yes. Add a rate_limit block to the analyze_json_from_file 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_file completely? +

Set action: deny in the PolicyLayer policy for analyze_json_from_file. 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_file? +

analyze_json_from_file 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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