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byaml-mcp

byaml-mcp

by breakingthecloud
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

schema_latest

Retrieves the current schema and catalog summary from schema.byaml.org, returning the version and type count for accurate data modeling.

Instructions

Versión vigente del schema + resumen del catálogo (fetch schema.byaml.org).

Devuelve latest + count de tipos del catalog v0.4.

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": "schema_latest"
  }
}

Input Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.4/5.0
Behavior3/5

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

No annotations are provided, so the description must carry the burden. It does disclose that it fetches from schema.byaml.org and returns specific data, implying a network operation. However, it does not explicitly state whether it is read-only, any failure modes, or authentication requirements. For a simple fetch, this is minimal but not contradictory.

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?

The description is two lines, front-loading the purpose and source. It is efficient and avoids fluff. However, it could be slightly more structured by including the response format or emphasizing the read-only nature, but it is appropriately sized for a zero-parameter tool.

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 tool with no parameters and no output schema, the description provides the essential information: what it fetches and what it returns. It does not mention error handling, response format, or prerequisites, but given its simplicity, these are not critical gaps. Adequate for an agent to call it successfully.

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 has zero parameters, so the description does not need to clarify parameter meaning. The baseline for zero parameters is 4, and the description does not detract from that.

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 clearly states it fetches the current schema version and a catalog summary, specifying the external source (schema.byaml.org) and the output (latest + count of types for catalog v0.4). This is a specific verb+resource and distinguishes itself from sibling tools that focus on graph, cost, or blast radius analysis.

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 guidance on when to use this tool versus alternatives. It merely states what it does without providing context on appropriate scenarios, prerequisites, or cases where it should not be used. Given zero parameters, this could be acceptable, but the description offers no routing clues.

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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