MCPTap v2.1.0

[pczerkas]

[2.1.0]

Added

• updated_tool_calls hook response support — the tool-call hook can now
  return updated_tool_calls in an allow response to rewrite tool call
  arguments (e.g. wrap shell commands with RTK) before the response is returned
  to the client. Each entry must contain a call_id and may override name
  and/or arguments (provided as a dict or JSON string). The proxy applies the
  updates to matching function_call items in the response body and
  re-serializes the response (both non-stream JSON and streaming SSE). Works in
  both synthetic-tool and direct-hook modes.

• RTK integration in example use_tool_hook.py — the example hook script
  now auto-detects the RTK binary on PATH
  (minimum version 0.23.0+) and rewrites shell commands in tool calls
  (exec_command, shell, Bash) through rtk rewrite, reducing token
  consumption by 60–90%. The check runs on each invocation and gracefully
  skips rewriting if RTK is absent or too old — no configuration change needed.

• 18 new tool-call rewrite tests — TestApplyToolCallUpdates,
  TestReSerializeResponse, and TestHookWithUpdatedToolCalls covering
  argument updates (dict/string), name-only updates, multiple calls,
  non-matching call_id, empty/invalid entries, and end-to-end integration
  with the proxy in both direct-hook and synthetic-tool modes.

• README documentation — added updated_tool_calls to the hook contract
  section, a new RTK integration section with a flow diagram, and updated the
  feature list to mention tool call argument rewriting.

Fixed

• SSE output item events — _build_sse_from_response now emits
  response.output_item.added and response.output_item.done events for each
  output item (including function_call items) in synthetic SSE streams.
  Previously only response.created and response.completed were emitted,
  preventing clients from parsing individual output items. Added 2 tests to
  verify the new events and that output items can be recovered via
  _response_json_from_sse.

Full Changelog

v2.0.0...v2.1.0

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This discussion was created from the release MCPTap v2.1.0.