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io.github.apasztetnik/el-buen-agente-mcp
io.github.apasztetnik/el-buen-agente-mcp in the official MCP registry.
Endpoint https://el-buen-agente-mcp-production.up.railway.app/mcp. Source: github.com/apasztetnik/el-buen-agente-mcp.
The registry describes it as: La guía 'El Buen Agente' como 18 tools para evaluar, mejorar y construir agentes LLM. En español.
We read its 18 tools on 2026-10-27. Nothing in them matched our tool-poisoning rules. It also sets server instructions, text a client puts in front of the model on connect; those were read too.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
recomendar_flujo get_el_buen_agente evaluar_necesidad revisar_rol_y_frontera revisar_outputs evaluar_autonomia revisar_frontera_ejecucion aplicar_challenger auditar_contexto challenger_decision disenar_evaluacion generar_contrato evaluar_sistema plan_exposicion_mcp checklist_nacimiento validar_veredicto construir_agente plan_de_inicio
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/io-github-apasztetnik-el-buen-agente-mcp)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.
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