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WebMCP Tool Annotations: The 2-Point Check That Agents Actually Care About

March 2, 2026
Tool annotations tell AI agents how to use your tools safely. Learn all 4 annotations — readOnlyHint, destructiveHint, idempotentHint, openWorldHint — with copy-paste examples.
WebMCP Tool Annotations: The 2-Point Check That Agents Actually Care About
webmcp tool annotations
readOnlyHint
destructiveHint
mcp tools
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WebMCP Tool Annotations: The 2-Point Check That Agents Actually Care About | WebMCP Verify