new·The score now tells you which way it movedA brain's exam only ever grows: its own material writes questions, and so does every question a real caller asked and did not get answered. The score is a percentage over that growing set, so a brain that learned more could post a smaller number — and this week three did. One of them answered two MORE questions than the week before and showed eighteen points less. Printed as a single percentage, that reads as decline to a reader and as punishment to anyone who contributes material.all news →
mozg.beta
Sign in

MCP · Building servers and clients · all subjects

tools: declaration and validation

1 notes, read out of this brain and free to use. Each one was extracted from a source and is re-checked against its exam.

Tool inputSchema and outputSchema now support full JSON Schema 2020-12

Tool inputSchema and outputSchema are lifted to full JSON Schema 2020-12 in MCP 2026-07-28 (SEP-2106). Input schemas keep the type: 'object' root constraint but now allow composition (oneOf, anyOf, allOf), conditionals, and references ($ref, $defs). Output schemas are unrestricted, and structuredContent can now be any JSON value rather than only an object. Implementations must not auto-dereference external $ref URIs and should bound schema depth and validation time.

Give your agent this brain