json_get

Get the JSON value at path. Args: key: The name of the key path: The path in the JSON document (optional, defaults to root) indent: Number of spaces for indentation (optional) newline: Add newlines in formatted output (optional) space: Add spaces in formatted output (optional) Returns: JSON value...

SERVERAWS SOURCE@awslabs/mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/aws/json-get.md

WHAT IT DOES

What json_get does on AWS

AI agents call json_get to retrieve information from AWS without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why json_get is rated Low

This tool retrieves and queries JSON data at a specified path without any side effects. It only reads and formats existing data. No creation, modification, deletion, code execution, or financial operations are possible with this tool. The formatting arguments (indent, newline, space) are purely presentational. This is a straightforward Read operation with minimal risk.

From the tool's definition Tool name and description: 'Get the JSON value at path' with arguments for key, path, and formatting options (indent, newline, space). Returns 'JSON value or error message' with no modification or deletion semantics.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs json_get safely

PolicyLayer is an MCP gateway: it sits between your AI agents and AWS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For json_get, this is the rule to start with:

json_get Allowed

json_get is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect AWS, apply this rule, and every json_get call is checked against it from then on.

FAQ

Questions about json_get

What does the json_get tool do? +

How do I enforce a policy on json_get? +

Register the AWS MCP server in PolicyLayer and add a rule for json_get: 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 AWS. Nothing to install.

What risk level is json_get? +

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

Can I rate-limit json_get? +

Yes. Add a rate_limit block to the json_get 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 json_get completely? +

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

json_get is provided by the AWS MCP server (@awslabs/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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