Nick Taylor 9/11/2025

Quick Fix: My MCP Tools Were Showing as Write Tools in ChatGPT Dev Mode

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The article details a developer's experience with MCP (Model Context Protocol) tools being misclassified as write tools in ChatGPT's developer mode. It provides the solution of adding specific tool annotations (readOnlyHint, openWorldHint) to correctly label read-only operations. It also explains the purpose of various MCP tool hints (destructiveHint, idempotentHint) and how they map to CRUD operations, linking to a GitHub pull request for a dev.to MCP server as an example.

Quick Fix: My MCP Tools Were Showing as Write Tools in ChatGPT Dev Mode

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