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r4ck: Hosting Deals

r4ck_deals
Read-onlyIdempotent

[r4ck] Current hosting deals and industry stories.

Served by r4ck (https://r4ck.dev/docs/mcp).

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": "r4ck_deals"
  }
}

Input Schema

NameRequiredDescriptionDefault
limitNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

C2.6/5.0
Behavior2/5

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

The annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. Beyond that the description adds nothing: no indication of how deals are sourced, how fresh they are, whether results are paginated, or whether the list is bounded.

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?

Two short lines that are front-loaded, but the first sentence is a near-restatement of the title, and the attribution line "Served by r4ck (https://...)" consumes roughly half the text without helping an agent decide or invoke.

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?

Not applicable as a gap — this is a simple, zero-required-parameter read tool whose annotations and lack of output schema mean little more needs saying. That said, the undocumented `limit` and the deals-vs-stories ambiguity leave real holes, so this cannot score higher.

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

Parameters2/5

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

The single parameter `limit` has 0% schema description coverage, and the description never mentions it — no statement of what it limits (number of deals? stories? items?) or its default or maximum. The description does nothing to compensate for the schema gap.

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

Purpose3/5

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

"Current hosting deals and industry stories" names a resource and implies recency, but it conflates two content types (deals vs. news stories) and offers no distinction from siblings like r4ck_cheapest or r4ck_stats. An agent can guess it returns a feed of deals, but not precisely what shape that content takes.

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

Usage Guidelines2/5

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

There is no when-to-use guidance, no statement of what this is good for versus the other r4ck tools, and no prerequisites or exclusions. The agent must infer entirely from the name.

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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