feat: Add tool annotations for improved LLM tool understanding #38
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Add readOnlyHint and destructiveHint annotations to all tools to help LLMs better understand tool behavior and make safer decisions. Changes: - Added ToolAnnotations import from MCP SDK types - Modified BaseTool class to support annotations property - Added destructiveHint: true to CreateUiTool (creates/modifies files) - Added readOnlyHint: true to FetchUiTool (read-only API call) - Added destructiveHint: true to LogoSearchTool (writes to filesystem) - Added destructiveHint: true to RefineUiTool (modifies components) - Added openWorldHint: true to all tools (interact with external APIs) - Added title annotations for human-readable display - Bump MCP SDK from ^1.8.0 to ^1.25.1 for annotation support This improves tool safety metadata for MCP clients. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
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Friendly ping! 👋 Just checking if this PR is still on your radar. Happy to address any feedback or make adjustments if needed. No rush - just wanted to make sure it didn't slip through the cracks. |
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Summary
Adds MCP tool annotations (
readOnlyHint,destructiveHint,openWorldHint,title) to all tools to help LLMs better understand tool behavior and make safer decisions about tool execution.Changes
annotationsabstract property and updatedregister()to pass annotations toserver.tool()destructiveHint: true,openWorldHint: true(opens browser, creates/modifies files)readOnlyHint: true,openWorldHint: true(read-only API call)destructiveHint: true,openWorldHint: true(writes to filesystem)destructiveHint: true,openWorldHint: true(modifies existing components)^1.8.0to^1.25.1for annotation supportWhy This Matters
openWorldHintindicates tools interact with external services (21st.dev, SVGL API)Testing
npm run build)npm run test)tools/listreturns annotations in responseBefore/After
Before:
{ "name": "21st_magic_component_inspiration", "description": "...", "inputSchema": {...} }After:
{ "name": "21st_magic_component_inspiration", "description": "...", "inputSchema": {...}, "annotations": { "title": "Fetch UI Inspiration", "readOnlyHint": true, "openWorldHint": true } }🤖 Generated with Claude Code