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render_python

Convert a structured YAML spec into idiomatic LangGraph Python code using deterministic Jinja2 templating. Blocks on spec validation errors to guarantee consistent output.

Instructions

Render the current spec into idiomatic LangGraph Python (graph.py by default).

Deterministic Jinja2 templating — no LLM involved, same spec always produces the same code. Blocks if the spec has validation errors (warnings still allow rendering).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
output_pathNo
project_dirYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.8/5.0
Behavior4/5

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

With no annotations provided, the description carries the full burden and does add meaningful behavioral context: deterministic Jinja2 templating, no LLM involvement, and error-blocking versus warning-tolerant rendering. It does not explicitly describe file overwriting or other side effects, but the default output path and rendering behavior are clearly disclosed.

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 three short, meaningful sentences with the core purpose front-loaded. The second sentence about determinism and validation behavior earns its place and adds no fluff.

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?

An output schema exists, so return-value documentation is not required. However, for a tool with no annotations that appears to write files, the description does not state how project_dir and output_path interact or whether an existing graph.py is overwritten. It covers validation behavior well but lacks full file-handling context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate for undocumented parameters. It only clarifies the output_path default via 'graph.py by default' and leaves project_dir and custom output_path behavior largely unexplained. This is partial compensation at best.

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 a specific action and resource: rendering the current spec into idiomatic LangGraph Python, defaulting to graph.py. This distinguishes it from sibling tools like get_spec and validate_graph, which inspect or validate rather than generate code.

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 the tool should be used after the spec is valid, since it blocks on validation errors, but it never explicitly says when to use it or when to prefer a sibling tool. No alternatives or exclusions are named.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.