util_json_validate
Validate and pretty-print JSON. Returns validity, errors, and formatted output.
This record as markdown: /tools/io-github-davidmosiah-delx-mcp-server/util-json-validate.md
What util_json_validate does on Delx MCP Server
AI agents call util_json_validate to retrieve information from Delx MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
input | string | Yes | JSON string to validate |
Parameters from the server's own tool schema.
Why util_json_validate is rated Low
This tool performs JSON schema validation and formatting, which are read operations that inspect and return information about data without creating, modifying, deleting, or executing code. No credentials, financial transactions, or irreversible actions are involved. The blast radius of misuse is minimal—an agent could waste cycles validating JSON but cannot harm systems or data.
From the tool's definition Tool description states it 'Validate and pretty-print JSON. Returns validity, errors, and formatted output.' The operations are validate, pretty-print, and return—all read-only, introspective actions with no modification or side effects.
Attacks that exploit this kind of access
The rule that runs util_json_validate safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Delx MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For util_json_validate, this is the rule to start with:
util_json_validate is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Delx MCP Server, apply this rule, and every util_json_validate call is checked against it from then on.
Questions about util_json_validate
Validate and pretty-print JSON. Returns validity, errors, and formatted output. It is categorised as a Read tool in the Delx MCP Server MCP Server, which means it retrieves data without modifying state.
util_json_validate accepts 1 parameter: input. Required: input. The full parameter table on this page comes from the server's own tool schema.
Register the Delx MCP Server MCP server in PolicyLayer and add a rule for util_json_validate: 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 Delx MCP Server. Nothing to install.
util_json_validate 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 util_json_validate 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 util_json_validate. 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.
util_json_validate is provided by the Delx MCP Server MCP server (delx-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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