JSON Toolbox Blog
Schema · Structured Output · Function Calling · MCP · local tooling in practice
The attack surface has moved from prompts to the tool bus and the Skill directory. This article unpacks malicious MCP servers, fake Skill handbooks, and how JSON Schema writes permissions as a contract you can validate.
A Skill is a handbook. MCP is the tool bus. Function Calling / API is the direct contract. Split SKILL.md, MCP servers, and JSON Tool Schema.
Read the article → GuideClaude Code, Codex, and Cursor Read first, then patch with exact strings. Workflows, strict JSON vs JSONC, and merging arrays.
Read the article → GuideUploading a file is only the entry. Split ChatGPT sandbox analysis and Work’s @Data, and how JSON / CSV enter the automatic analysis loop.
Read the article → TrendsFrom i-have-adhd and diagram-design to agentskills.io: how SKILL.md loads on demand, and the boundary with Rules / MCP.
Read the article → AnalysisSurfaces differ; the contract is a structured object. JSON, JSON Schema, the agent loop — plus one sample all three can line up on.
Read the article → AnalysisSiri AI acts through an App Intents Schema. Foundation Models’ @Generable compiles to JSON Schema. The agent still hands over an object.
Read the article → AnalysisHow GPU-hours, data centers, power, tokens, and inference add up — and what 7B / 70B / 405B / flagship each cost.
Read the article → AnalysisStructured Output is not “please return JSON.” Constrained decoding, and why GPT, Gemini, and Claude pushed Schema into the API.
Read the article → AnalysisThree vendors wrap the API differently; the contract layer is JSON Schema. Structured Output, Function Calling, and MCP.
Read the article → ComparisonThere is no single strongest model. Split GPT-5.6 / GPT-6 Astra, Claude Fable 5.1, Gemini 3.8 Flash, Grok 4.6, and Llama 4 by task.
Read the article → AnalysisGoogle has not announced a date. Pre-training was confirmed 2026-07-21. Official wording, the 3.x cadence, and Schema you can lock in now.
Read the article → TrendsResponses API, Programmatic Tool Calling, MCP, and the Agents SDK are already shipping. Direct vs programmatic paths, and validatable JSON.
Read the article → AnalysisTwo APIs, WordInfo JSON, word-level timestamps, speaker diarization — and why not to mix native STT with Structured Output.
Read the article → GuideInfer a Schema from real JSON. Lock types, required, and additionalProperties, then compare OpenAI, Claude, and Gemini wrappers.
Read the article →Go back to the Workbench, paste JSON or load a sample, and generate a Schema, run a Diff, or write Function Calling.
Open the Workbench →