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sandbox_wizard_info

[FREE] The x402 Payment Sandbox Wizard - a free guided builder at https://x402-agent-pay.com/sandbox/ that takes an x402 developer from blank page to verified, simulated settlement: build the exact payment envelope this facilitator expects (schema derived from the live verify code so it never drifts), sign it with a browser wallet or paste-a-signature, run the REAL free /verify, then a dry-run /simulate settle. No USDC ever moves in the sandbox. Returns the live honest analytics counters (payloads built, verify pass/fail, simulate pass, 7-day windows) and the wizard URL.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "sandbox_wizard_info"
  }
}

Input Schema

NameRequiredDescriptionDefault

No arguments

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Added

TDQS

A3.5/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations exist, so the description carries the full burden. It discloses that the operation is free and that no USDC moves, and that it returns counters, but much of the text describes the external wizard web page rather than the tool call's own behavior (no auth, rate-limit, or side-effect notes).

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single long sentence with dense parentheticals and marketing-style asides ('schema derived from the live verify code so it never drifts') that don't serve agent tool selection. The actual deliverable (counters + wizard URL) is buried at the end rather than front-loaded.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a parameterless info tool with an output schema, coverage is adequate: the description explains the free/no-settlement nature and what the counters represent. The output schema covers return details, so nothing essential is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Zero parameters, so the baseline is 4. The description adds no parameter meaning, which is appropriate since the tool accepts none.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific resource (the x402 Payment Sandbox Wizard) and what it provides (a guided builder URL plus live analytics counters). It is distinguishable from the sandbox_simulate/sandbox_snapshot siblings, though it does not explicitly name them to draw the contrast.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Implies usage (free, no USDC moves, guided path from blank page to simulated settlement) but never states when to call this tool versus sandbox_simulate or sandbox_snapshot. No explicit when/when-not or alternative routing.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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