diff --git a/pyproject.toml b/pyproject.toml index f2b0e6a..cfd83c0 100644 --- a/pyproject.toml +++ b/pyproject.toml @@ -17,7 +17,7 @@ classifiers = [ "Topic :: Office/Business :: Financial", ] dependencies = [ - "mcp>=1.0.0,<2.0.0", # 2.0 移除了 Server 的 list_tools/call_tool decorator API（issue #16） + "mcp>=2.0.0", "httpx>=0.27", "pydantic>=2.0", ] diff --git a/src/finmind_mcp/knowledge.py b/src/finmind_mcp/knowledge.py index 30d7d3d..f373c29 100644 --- a/src/finmind_mcp/knowledge.py +++ b/src/finmind_mcp/knowledge.py @@ -58,7 +58,7 @@ def resource_definitions() -> list[Resource]: uri=f"finmind://{suffix}", name=suffix, description=f"FinMind knowledge pack: {filename}", - mimeType="text/markdown", + mime_type="text/markdown", ) ) return resources diff --git a/src/finmind_mcp/server.py b/src/finmind_mcp/server.py index 6d1a086..22491e1 100644 --- a/src/finmind_mcp/server.py +++ b/src/finmind_mcp/server.py @@ -4,6 +4,10 @@ shared knowledge pack. Designed to be launched by an MCP host such as Claude Desktop, Claude Code, Cursor, Windsurf, or Gemini CLI. +Handlers are passed to the `Server` constructor: mcp 2.0 removed the 1.x +`@app.list_tools()` decorators in favour of `on_*` keyword arguments, and +handlers now take `(ctx, params)` and return full result models. + Run via: finmind-mcp or: @@ -15,36 +19,61 @@ import asyncio import logging +import mcp.types as types from mcp.server import Server from mcp.server.stdio import stdio_server -from mcp.types import Resource, TextContent, Tool from . import knowledge, tools logger = logging.getLogger(__name__) -app: Server = Server("finmind") - - -@app.list_tools() -async def list_tools() -> list[Tool]: - return tools.tool_definitions() - - -@app.call_tool() -async def call_tool(name: str, arguments: dict | None) -> list[TextContent]: - result = await tools.dispatch(name, arguments or {}) - return [TextContent(type="text", text=result)] - - -@app.list_resources() -async def list_resources() -> list[Resource]: - return knowledge.resource_definitions() -@app.read_resource() -async def read_resource(uri) -> str: - # `uri` is a pydantic AnyUrl in current MCP SDK; convert to string. - return knowledge.read(str(uri)) +async def on_list_tools(ctx, params) -> types.ListToolsResult: + return types.ListToolsResult(tools=tools.tool_definitions()) + + +async def on_call_tool(ctx, params) -> types.CallToolResult: + # mcp 1.x turned a raising handler into `isError`; mcp 2.0 lets the + # exception become a JSON-RPC protocol error, which hosts report as a + # server failure instead of showing the model something it can act on. + try: + result = await tools.dispatch(params.name, params.arguments or {}) + except Exception as exc: # noqa: BLE001 — surfaced to the model, not swallowed + logger.exception("tool %s failed", getattr(params, "name", "?")) + return types.CallToolResult( + content=[types.TextContent(type="text", text=str(exc))], + is_error=True, + ) + return types.CallToolResult( + content=[types.TextContent(type="text", text=result)] + ) + + +async def on_list_resources(ctx, params) -> types.ListResourcesResult: + return types.ListResourcesResult(resources=knowledge.resource_definitions()) + + +async def on_read_resource(ctx, params) -> types.ReadResourceResult: + # `params.uri` is a pydantic AnyUrl; knowledge.read wants a plain string. + uri = str(params.uri) + return types.ReadResourceResult( + contents=[ + types.TextResourceContents( + uri=uri, + mime_type="text/markdown", + text=knowledge.read(uri), + ) + ] + ) + + +app: Server = Server( + "finmind", + on_list_tools=on_list_tools, + on_call_tool=on_call_tool, + on_list_resources=on_list_resources, + on_read_resource=on_read_resource, +) async def _run() -> None: diff --git a/src/finmind_mcp/tools.py b/src/finmind_mcp/tools.py index 83b2785..bc4bdce 100644 --- a/src/finmind_mcp/tools.py +++ b/src/finmind_mcp/tools.py @@ -53,7 +53,7 @@ def tool_definitions() -> list[Tool]: " start_date（YYYY-MM-DD），回傳 markdown 表格。超過 500 列會截斷" "並標註總列數。" ), - inputSchema={ + input_schema={ "type": "object", "properties": { "dataset": { @@ -82,7 +82,7 @@ def tool_definitions() -> list[Tool]: "列出 FinMind 支援的所有 dataset（讀取內建知識庫，不需連線）。" "依分類回傳 dataset 名稱、會員層級與說明的 markdown 條列。" ), - inputSchema={"type": "object", "properties": {}}, + input_schema={"type": "object", "properties": {}}, ), Tool( name="get_stock_info", @@ -90,7 +90,7 @@ def tool_definitions() -> list[Tool]: "查詢台股代號 / 中文名 / 產業別總覽（呼叫 TaiwanStockInfo）。" "可選 stock_id 指定單一標的；未提供時回傳全市場清單（會截斷）。" ), - inputSchema={ + input_schema={ "type": "object", "properties": { "stock_id": { @@ -107,7 +107,7 @@ def tool_definitions() -> list[Tool]: "此 dataset 走專屬 endpoint 不在 /api/v4/data 通用路徑：必填股票代號 data_id" "與單一日期 date（非區間）。需要 Sponsor 等級。" ), - inputSchema={ + input_schema={ "type": "object", "properties": { "data_id": { diff --git a/tests/test_server.py b/tests/test_server.py new file mode 100644 index 0000000..ec23014 --- /dev/null +++ b/tests/test_server.py @@ -0,0 +1,105 @@ +"""Tests for the MCP protocol handlers in server.py. + +Since the mcp 2.0 migration the handlers are plain async functions registered +on the `Server` constructor, so they can be called directly — no subprocess, +no transport. `smoke.py` and `regression/runner.py` still cover the real +stdio handshake end to end. +""" + +import mcp.types as types +import pytest + +from finmind_mcp import server, tools + + +class _Params: + """Stand-in for the pydantic params models the runner passes in. + + The handlers only read attributes off params, so a namespace is enough. + """ + + def __init__(self, **kwargs): + self.__dict__.update(kwargs) + + +async def test_list_tools_returns_the_four_tools(): + result = await server.on_list_tools(None, None) + + assert isinstance(result, types.ListToolsResult) + assert [t.name for t in result.tools] == [ + "query_dataset", + "list_datasets", + "get_stock_info", + "query_trading_daily_report", + ] + + +async def test_call_tool_wraps_dispatch_output_as_text_content(monkeypatch): + async def fake_dispatch(name, arguments): + return f"dispatched {name} {arguments}" + + monkeypatch.setattr(tools, "dispatch", fake_dispatch) + + result = await server.on_call_tool( + None, _Params(name="query_dataset", arguments={"dataset": "TaiwanStockPrice"}) + ) + + assert isinstance(result, types.CallToolResult) + assert not result.is_error + assert result.content[0].text == ( + "dispatched query_dataset {'dataset': 'TaiwanStockPrice'}" + ) + + +async def test_call_tool_handles_omitted_arguments(monkeypatch): + seen = {} + + async def fake_dispatch(name, arguments): + seen["arguments"] = arguments + return "ok" + + monkeypatch.setattr(tools, "dispatch", fake_dispatch) + + await server.on_call_tool(None, _Params(name="list_datasets", arguments=None)) + + assert seen["arguments"] == {} + + +async def test_call_tool_reports_errors_as_tool_results_not_protocol_errors(): + """A raising dispatch must come back as isError, not as an exception. + + mcp 1.x wrapped call_tool handlers and turned exceptions into + `CallToolResult(isError=True)`; mcp 2.0 lets them escape and become + JSON-RPC protocol errors, which hosts surface as a server failure rather + than feeding back to the model. server.py restores the old behaviour, and + this test is what keeps it restored. + """ + result = await server.on_call_tool(None, _Params(name="no_such_tool", arguments={})) + + assert isinstance(result, types.CallToolResult) + assert result.is_error + assert "no_such_tool" in result.content[0].text + + +async def test_list_resources_exposes_the_knowledge_pack(): + result = await server.on_list_resources(None, None) + + assert isinstance(result, types.ListResourcesResult) + assert result.resources, "expected at least one bundled knowledge resource" + assert all(str(r.uri).startswith("finmind://") for r in result.resources) + + +async def test_read_resource_returns_markdown_contents(): + uri = str((await server.on_list_resources(None, None)).resources[0].uri) + + result = await server.on_read_resource(None, _Params(uri=uri)) + + assert isinstance(result, types.ReadResourceResult) + contents = result.contents[0] + assert contents.mime_type == "text/markdown" + assert contents.text.strip() + + +async def test_read_resource_rejects_unknown_uri(): + with pytest.raises(ValueError): + await server.on_read_resource(None, _Params(uri="finmind://nope")) diff --git a/tests/test_tools.py b/tests/test_tools.py index 8ecd2df..e07b6dc 100644 --- a/tests/test_tools.py +++ b/tests/test_tools.py @@ -63,8 +63,8 @@ def test_tool_definitions_returns_four_tools(): ] for d in defs: assert d.description - 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