{"name":"openWorldHint","slug":"openworldhint","family":"setting","title":"Settings keys","noun":"settings key","description":"MCP tools can now declare hints like search_hint, always_load, and a maximum result size, alongside existing annotations","description_source":"entry","described_by":{"version":"2.1.267","anchor":"mcp-tool-declarations-gain-hints-and-richer-annotation-limit"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.309","builds":0,"mined_builds":150,"first_cited":{"version":"2.1.309","released_at":"2026-10-22 20:34:13","spans":2}},"aliases":[],"entries":[{"version":"2.1.309","anchor":"mcp-tools-expose-openworldhint","heading":"Claude Code now reads the openWorldHint that MCP tools declare","line":"Claude Code now passes along the `openWorldHint` an MCP server sets on a tool, as well as its read-only and destructive hints","released_at":"2026-10-22 20:34:13","reason":"named in this entry, found in this entry's text"},{"version":"2.1.267","anchor":"mcp-tool-declarations-gain-hints-and-richer-annotation-limit","heading":"MCP tool declarations gain hints and richer annotation limits (search_hint, always_load, max_result_size_chars, requires_user_interaction)","line":"MCP tools can now declare hints like search_hint, always_load, and a maximum result size, alongside existing annotations","released_at":"2026-09-09 18:25:42","reason":"found in this entry's text"}],"entries_total":2,"docs":[{"source":"claude-code","path":"agent-sdk\/custom-tools","title":"Give Claude custom tools","documented":false},{"source":"claude-code","path":"agent-sdk\/python","title":"Agent SDK reference - Python","documented":false},{"source":"claude-code","path":"agent-sdk\/typescript","title":"Agent SDK reference - TypeScript","documented":false},{"source":"mcp","path":"community\/interest-groups\/tool-annotations","title":"Tool Annotations Charter","documented":false}],"docs_total":4,"gates":[],"related":[],"url":"https:\/\/changelogs.core-directive.com\/reference\/setting\/openworldhint","family_url":"https:\/\/changelogs.core-directive.com\/reference\/setting.json"}