Quietforge x402 Tools

Generate one solver-verified sudoku

sudoku_puzzle

Read-onlyIdempotent

Use this when a user wants a sudoku to play or print, or an app needs a verified puzzle at a named difficulty. Generates ONE sudoku puzzle with a unique solution, 180-degree symmetry, graded by the solving techniques it needs (easy | medium | hard | expert). Returns 81-char puzzle and solution strings (row by row, 0 = empty), given count and technique list. Deterministic when a seed is supplied. 20 per minute shared by all clients.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`seed`	No	Integer 1-2147483647 for a reproducible puzzle; omit for a random one.
`level`	No	Difficulty by solving technique: easy, medium, hard or expert.	medium

Output Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedOct 7, 2026
- removedInput schema / properties / seed / anyOf
```
Removed value: -[
-  {
-    "type": "integer"
-  },
-  {
-    "type": "null"
-  }
-]
```
- removedInput schema / properties / seed / default
```
Removed value: -null
```
- addedInput schema / properties / seed / type
```
Added value: +"integer"
```

Changed2 schema fields changedSep 23, 2026

addedInput schema / properties / level / description

Added value: +"Difficulty by solving technique: easy, medium, hard or expert."

addedInput schema / properties / seed / description

Added value: +"Integer 1-2147483647 for a reproducible puzzle; omit for a random one."

First observedSep 21, 2026

TDQS

A4.5/5.0

Behavior5/5

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

Annotations already declare readOnly, idempotent, closed-world and non-destructive, so the safety bar is low; the description still adds substantial non-obvious behavior: unique solvability, symmetry guarantee, technique-based difficulty grading, determinism tied to seed, and a 20/min shared rate limit.

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

Conciseness5/5

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

Three tight sentences, front-loaded with the use case and then the guarantees, output format, determinism and rate limit. No filler and no repetition of the title.

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

Completeness5/5

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

For a zero-required-parameter generative tool, the description covers triggering context, correctness guarantees, output encoding ('81-char puzzle and solution strings, row by row, 0 = empty'), determinism and throttling. Return values are also backed by an output schema, so nothing needed to call it correctly is missing.

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

Parameters3/5

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

Schema coverage is 100% and both parameters are fully documented there, including the level values (easy/medium/hard/expert) and the seed range, so the description's mention of the same values is largely redundant. It does add the determinism link between seed and reproducibility, which is marginal value beyond the schema.

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

Purpose5/5

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

States a specific verb and resource ('Generates ONE sudoku puzzle') and immediately qualifies scope with 'unique solution, 180-degree symmetry, graded by solving techniques'. An agent can distinguish this from every sibling (all pricing/x402 tools) at a glance.

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

Usage Guidelines4/5

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

Opens with an explicit when-to-use: 'Use this when a user wants a sudoku to play or print, or an app needs a verified puzzle at a named difficulty.' Clear trigger conditions, but no when-not guidance or named alternatives, and none of the siblings are plausible substitutes so exclusion is less critical.

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

All Quietforge x402 Tools tools Inspect

Try in Browser

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Glama MCP Gateway

Add one secure layer between your agents and this server.