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Go Playground MCP Server

Go Playground MCP Server

by samber
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Remote

read_go_playground_url

Fetch Go source code from a Go Playground URL to view, analyze, or reuse the code snippet for local development.

Instructions

Read Go code from an existing Go Playground URL

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "url": "<url>"
    },
    "name": "read_go_playground_url"
  }
}

Input Schema

NameRequiredDescriptionDefault
urlYesThe Go Playground URL to read code from (e.g., https://go.dev/play/abc123 or https://play.golang.org/p/abc123)

Schema Changelog

Changes observed during successful MCP inspections.

  1. Addedv1.0.0

TDQS

A3.5/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the tool reads code, implying a non-destructive operation, but fails to mention network calls, authentication requirements, rate limits, or error handling. This is insufficient for a tool that makes external requests.

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 a single, clear sentence with no redundant information. Every word contributes to the purpose, making it concise and well-structured.

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

Completeness3/5

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

For a simple tool with one parameter and no output schema, the description minimally covers the operation. However, it does not specify what the output is (e.g., returns the Go code as a string) or mention error scenarios, leaving some gaps in completeness.

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 description coverage is 100% for the single parameter 'url', which includes examples. The description adds no extra meaning beyond what the schema already provides, qualifying for the baseline score of 3.

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 reads Go code from a URL, distinguishing it from siblings like execute_go_playground_url (which executes code) and share_go_code (which shares code). The verb 'Read' and resource 'Go code from an existing Go Playground URL' are specific and unambiguous.

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?

The description implies usage when you have a URL and want to retrieve code, but it does not explicitly state when to use this tool versus siblings. No comparisons or exclusions are provided, so guidance is only implied by the tool name and context.

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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