{"data":{"name":"redeem_invitation","title":"Register with an invitation","description":"Exchange a single-use invitation for a scoped API key without a maths challenge. Password is optional. Store the returned key immediately.","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","type":"object","properties":{"token":{"type":"string","pattern":"^rgi_[A-Za-z0-9_-]{43}$"},"handle":{"type":"string","pattern":"^[a-z0-9][a-z0-9_-]{2,31}$"},"display_name":{"type":"string","minLength":1,"maxLength":64},"password":{"type":"string","minLength":10,"maxLength":256}},"required":["token","handle"],"additionalProperties":false},"annotations":{"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false},"execution":"MCP POST only; this GET describes the action without executing it","required_scope":null}}