What
New boolean configuration option for MCP servers that forces all tools from a server to always be included in the prompt, bypassing tool search deferral.
Details
- Added to all MCP server config types: stdio, HTTP, and SSE
- When
true, tools are never deferred behind tool search - Equivalent to setting
defer_loading: falseon the API - Default behavior: tools are deferred when tool search is enabled
Evidence
MCP alwaysLoad option (search for "When true, all tools from this server are always included")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agree
Added alwaysLoad option to MCP server config — when true, all tools from that server skip tool-search deferral and are always available