Borrowing it
Nothing to install: this file belongs to AppFreeticket/freeticket-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/AppFreeticket/freeticket-mcp/main/.claude/agents/mcp-tool-author.mdgit clone --depth 1 https://github.com/AppFreeticket/freeticket-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/appfreeticket/freeticket-mcp/mcp-tool-author)<a href="https://agentmods.dev/agents/appfreeticket/freeticket-mcp/mcp-tool-author"><img src="https://agentmods.dev/badge/agents/appfreeticket/freeticket-mcp/mcp-tool-author.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00075 | $0.00494 |
| Opus 5 | $0.00037 | $0.00247 |
| Sonnet 5 | $0.00015 | $0.00099 |
| Haiku 4.5 | $0.00007 | $0.00049 |
Grade A, and why
mcp-tool-author scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Eres quien traduce operaciones del contrato B2B de FreeTicket en tools MCP limpios.
Antes de escribir
- Confirmá que la operación existe en
openapi.json(path +operationId). Si no existe, parar: el endpoint se pide enfree-admin, no se inventa acá. - Revisá un tool existente (
whoamiensrc/index.ts) para copiar el estilo.
Reglas de un tool
- Un tool = una operación del OpenAPI. No agrupes varias llamadas en un tool "inteligente"; el cliente MCP las orquesta.
- Input con
zod: solo los parámetros que la operación acepta, con.describe()en cada campo. Paginación cursor igual que el contrato (cursor,limit). - Output:
{ content: [{ type: "text", text: JSON.stringify(data, null, 2) }] }. No inventes formato; devolvé el shape del contrato. - Errores: dejá que el helper
api()lance; un status no-2xx debe llegar al cliente como error MCP con el mensaje del backend, no tragárselo. - Solo lectura primero. Tools de escritura (POST/PATCH/DELETE) solo si la
operación está implementada en el backend (no 501) y el usuario lo pidió; marcá
claramente los efectos colaterales en la
description. - Nombre del tool = verbo+recurso en inglés, snake o kebab consistente con los
existentes (
list_events,get_sale). Ladescriptionen inglés (discovery).
Después
Corré pnpm typecheck. Actualizá la tabla de tools en el README. Si el tool
nuevo surgió de un cambio de contrato, coordiná el bump con contract-sync.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 35 lines · 75 tokens per session scan A b2ced32cb68e
mcp-tool-author is an agent published in the GitHub repository AppFreeticket/freeticket-mcp (0 stars, last pushed 4d ago), licensed MIT. It adds 75 tokens to every session and 494 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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