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marketplace_diagnostics

Read-only

Runs lightweight connectivity probes against configured marketplaces and reports which are reachable, helping diagnose download failures.

Instructions

Run connectivity checks against all configured marketplaces.

Performs a lightweight probe (empty search) against each connected marketplace and reports which ones are reachable. Useful for debugging download failures.

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": "marketplace_diagnostics"
  }
}

Input Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.8/5.0
Behavior4/5

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

The annotations already cover safety (readOnlyHint true, destructiveHint false) and openness, so the description is not carrying the full burden. It still adds value beyond them by disclosing the mechanism and cost profile: a lightweight empty-search probe fanning out to every configured marketplace. It omits timeout/failure detail and rate-limit behavior, keeping it from a 5.

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

Conciseness4/5

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

Three short sentences, front-loaded with the action and immediately followed by the mechanism and the use case. There is mild redundancy between 'connectivity checks... reports which ones are reachable' and the probe sentence, but nothing is wasted.

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 zero-parameter, read-only diagnostic with no output schema, the description covers scope, mechanism, and motivation adequately. It could say more about what the report contains or how slow the sweep may be, but nothing essential for correct invocation 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?

The tool takes zero parameters, so there is nothing in the schema needing explanation; baseline 4 applies. The description correctly implies the scope is implicit (all configured marketplaces), matching the empty argument object.

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?

The description names a specific verb and resource (connectivity checks against all configured marketplaces) and states the outcome (which ones are reachable). It does not explicitly distinguish itself from the nearby marketplace_status/marketplace_info siblings, so it falls short of a 5.

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?

It gives an implied trigger ('useful for debugging download failures'), which is real context, but never names an alternative or states when NOT to use it versus marketplace_status, even though that sibling is the obvious competing choice.

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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