v1.19.1

Fixed

• gateway.describe now exposes nested array/object item schemas. Array and
  object arguments were collapsed to a bare "array"/"object" type, hiding
  item shape and required item fields, so agents wasted calls guessing at the
  payload (e.g. brightdata::search_engine_batch needs
  {"queries": [{"query": "..."}]}). ArgInfo gains an optional item_schema
  with a compact one-level summary, and the invoke_template placeholder now
  shows the nested shape (e.g. [{"query": "<string>"}]). Scalar-arg output is
  unchanged. (issue #87)
• index-it-mcp manifest entry now launches the stdio transport. The
  shipped entry ran serve (the HTTP/admin surface) where PMCP's local process
  path needs a stdio MCP child; command/args and all four install platforms
  now end in stdio. (issue #89)

Docs

• README pilot config for provisioning index-it-mcp via .mcp.json with a
  pinned version and the operational env block, noting that per-entry env is
  honored only from .mcp.json (the manifest/overlay schema has no env:).