jq

Processes and transforms JSON using jq expressions. Accepts JSON from a file path or inline string. Returns the transformed result.

SERVERGo SOURCEDave-London/Pare

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-dave-london-go/jq.md

WHAT IT DOES

What jq does on Go

AI agents invoke jq to trigger actions in Go. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why jq is rated High

jq executes arbitrary filter/transform expressions against JSON data. While typically read-only in nature, jq expressions can be used to run complex logic and the tool 'executes' expressions rather than merely reading data. Misuse could leak sensitive data or be used to process confidential JSON payloads.

From the tool's definition Processes and transforms JSON using jq expressions

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs jq safely

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

jq Rate-limited

jq stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "jq": {
      "limits": [
        {
          "counter": "jq_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about jq

What does the jq tool do? +

Processes and transforms JSON using jq expressions. Accepts JSON from a file path or inline string. Returns the transformed result. It is categorised as a Execute tool in the Go MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on jq? +

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

What risk level is jq? +

jq is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit jq? +

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

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

jq is provided by the Go MCP server (Dave-London/Pare). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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