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The Stall

The Stall

by thebrierfox
OverviewSchemaSourceRelated ServersDiscussionsAdmin
JavaScript
Remote

ping

Check system liveness and verify x402 rail and Bazaar listing by sending an optional echo message to receive a timestamp and the echoed string.

Instructions

Liveness + echo probe. Pays back a timestamp and echoes msg. Use to verify the x402 rail and Bazaar listing end to end.

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": "ping"
  }
}

Input Schema

NameRequiredDescriptionDefault
msgNooptional string to echo back

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

A4.1/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full burden. It mentions returning a timestamp and echoing the message, implying a read-only operation, but does not explicitly state non-destructive behavior or other traits.

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?

The description is very concise with only two sentences, front-loading key information ('Liveness + echo probe'). Every word adds value.

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?

Given the tool's simplicity (one optional parameter, no output schema), the description is sufficient for an agent to understand and use it correctly.

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% with a single parameter described. The description adds that the message is optional and will be echoed, which is consistent with the schema but does not provide additional meaning beyond it.

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?

The description clearly states the tool as a 'Liveness + echo probe' that returns a timestamp and echoes the message. It distinguishes itself from the many sibling tools by being a simple connectivity check.

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?

It explicitly indicates usage for verifying the x402 rail and Bazaar listing end to end, providing specific context. However, it does not mention when not to use it or alternatives.

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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