arcade-mcp/libs/arcade-core/arcade_core/parse.py
Sam Partee 27a6cd31a3
Support Tool Output in ValueSchema of ToolDefinition (#487)
## Before

### Tool: ``GoogleNews.SearchNewsStories``

```python
@tool(requires_secrets=["SERP_API_KEY"])
async def search_news_stories(
    context: ToolContext,
    keywords: Annotated[
        str,
        "Keywords to search for news articles. E.g. 'Apple launches new iPhone'.",
    ],
    country_code: Annotated[
        CountryCode | None,
        "2-character country code to search for news articles. "
        "E.g. 'us' (United States). "
        f"Defaults to '{DEFAULT_GOOGLE_NEWS_COUNTRY}'.",
    ] = None,
    language_code: Annotated[
        LanguageCode,
        "2-character language code to search for news articles. E.g. 'en' (English). "
        f"Defaults to '{DEFAULT_GOOGLE_NEWS_LANGUAGE}'.",
    ] = DEFAULT_GOOGLE_NEWS_LANGUAGE,
    limit: Annotated[
        int | None,
        "Maximum number of news articles to return. Defaults to None "
        "(returns all results found by the API).",
    ] = None,
) -> Annotated[dict[str, Any]]:
    """Search for news articles related to a given query."""
    ...
```


### Tool Definition: ``GoogleNews.SearchNewsStories``
```
  {
    "name": "SearchNewsStories",
    "fully_qualified_name": "GoogleNews.SearchNewsStories",
    "description": "Search for news articles related to a given query.",
    "toolkit": {
      "name": "GoogleNews",
      "description": "Arcade.dev LLM tools for getting new via Google News",
      "version": "2.0.0"
    },
    "input": {
      "parameters": [
        {
          "name": "keywords",
          "required": true,
          "description": "Keywords to search for news articles. E.g. 'Apple launches new iPhone'.",
          "value_schema": {
            "val_type": "string",
            "inner_val_type": null,
            "enum": null,
          },
          "inferrable": true
        },
        {
          "name": "country_code",
          "required": false,
          "description": "2-character country code to search for news articles. E.g. 'us' (United States). Defaults to 'None'.",
          "value_schema": {
            "val_type": "string",
            "inner_val_type": null,
            "enum": null,
          },
          "inferrable": true
        },
        {
          "name": "language_code",
          "required": false,
          "description": "2-character language code to search for news articles. E.g. 'en' (English). Defaults to 'en'.",
          "value_schema": {
            "val_type": "string",
            "inner_val_type": null,
            "enum": null,
          },
          "inferrable": true
        },
        {
          "name": "limit",
          "required": false,
          "description": "Maximum number of news articles to return. Defaults to None (returns all results found by the API).",
          "value_schema": {
            "val_type": "integer",
            "inner_val_type": null,
            "enum": null,

          },
          "inferrable": true
        }
      ]
    },
    "output": {
      "description": "News search results with article details.",
      "available_modes": [
        "value",
        "error"
      ],
      "value_schema": {
        "val_type": "json"
      }
    },
    "requirements": {
      "authorization": null,
      "secrets": [
        {
          "key": "serp_api_key"
        }
      ],
      "metadata": null
    },
    "deprecation_message": null
  },
```

## After

### Enhanced Tool: ``GoogleNews.SearchNewsStories``

```python

"""Type definitions for Google News API responses and parameters."""

from typing_extensions import TypedDict

CountryCode = str
LanguageCode = str


class SearchNewsParams(TypedDict):
    """Input parameters for searching news articles."""

    keywords: str
    """Search query terms to find relevant news articles \
    (e.g., 'Apple launches new iPhone')."""

    country_code: CountryCode | None
    """Optional 2-letter country code to filter news by region \
    (e.g., 'us' for United States, 'uk' for United Kingdom)."""

    language_code: LanguageCode | None
    """Optional 2-letter language code to filter news by language \
    (e.g., 'en' for English, 'es' for Spanish)."""

    limit: int | None
    """Optional maximum number of news articles to return. \
    If not specified, returns all results from the API."""


class SourceInfo(TypedDict, total=False):
    """Information about the news source/publication."""

    name: str
    """Name of the publication (e.g., 'CNN', 'BBC News', 'The New York Times')."""

    icon: str
    """URL to the source's favicon or logo image."""

    authors: list[str]
    """List of author names for the article, if available."""


class NewsResult(TypedDict, total=False):
    """Individual news article from the Google News API response."""

    position: int
    """Ranking position of this result in the search results."""

    title: str
    """Headline or title of the news article."""

    link: str
    """Full URL to the original news article."""

    source: SourceInfo
    """Information about the publication source."""

    date: str
    """Publication date and time (e.g., '2 hours ago', 'Dec 15, 2023')."""

    snippet: str
    """Brief excerpt or summary from the article content."""

    thumbnail: str
    """URL to a high-resolution thumbnail image for the article."""

    thumbnail_small: str
    """URL to a low-resolution thumbnail image for the article."""

    story_token: str
    """Token for accessing full coverage of this news story across multiple sources."""

    stories: list["NewsResult"]
    """Related news stories from other sources covering the same topic."""

    highlight: dict
    """Additional highlighted information about the story."""


class SearchMetadata(TypedDict, total=False):
    """Metadata about the search request and processing."""

    id: str
    """Unique identifier for this search request within SerpApi."""

    status: str
    """Current processing status ('Processing', 'Success', or 'Error')."""

    json_endpoint: str
    """URL to retrieve the JSON results for this search."""

    created_at: str
    """Timestamp when the search request was created."""

    processed_at: str
    """Timestamp when the search request was processed."""

    google_news_url: str
    """Original Google News URL that would return these results."""

    total_time_taken: float
    """Total time in seconds taken to process this search."""


class SearchParameters(TypedDict, total=False):
    """Parameters used for the search request."""

    engine: str
    """Search engine used (always 'google_news' for this API)."""

    q: str
    """Search query string."""

    gl: str
    """Country code used for geographic filtering."""

    hl: str
    """Language code used for language filtering."""

    topic_token: str
    """Token for accessing specific news topics (e.g., 'World', 'Business', 'Technology')."""

    publication_token: str
    """Token for accessing news from specific publishers."""


class MenuLink(TypedDict):
    """Navigation link for news categories or topics."""

    title: str
    """Display text for the menu item (e.g., 'Technology', 'Sports', 'Business')."""

    topic_token: str
    """Token to access this specific topic or category."""

    serpapi_link: str
    """SerpApi URL to search within this topic."""


class TopStoriesLink(TypedDict):
    """Link to top stories section."""

    topic_token: str
    """Token to access top stories."""

    serpapi_link: str
    """SerpApi URL to retrieve top stories."""


class GoogleNewsResponse(TypedDict, total=False):
    """Complete response from the Google News API."""

    search_metadata: SearchMetadata
    """Metadata about the search request and processing."""

    search_parameters: SearchParameters
    """Parameters that were used for this search."""

    news_results: list[NewsResult]
    """List of news articles matching the search criteria."""

    menu_links: list[MenuLink]
    """Navigation links to different news categories and topics."""

    top_stories_link: TopStoriesLink
    """Link to access top stories."""

    title: str
    """Title of the page or topic being displayed."""


class SimplifiedNewsResult(TypedDict):
    """Simplified news article format for tool output."""

    title: str
    """Headline of the news article."""

    link: str
    """URL to the full article."""

    source: str | None
    """Name of the publication source."""

    date: str | None
    """When the article was published."""

    snippet: str | None
    """Brief excerpt from the article."""


class SearchNewsOutput(TypedDict):
    """Output format for the search_news_stories tool."""

    news_results: list[SimplifiedNewsResult]
    """List of news articles in simplified format."""

@tool(requires_secrets=["SERP_API_KEY"])
async def search_news_stories(
    context: ToolContext,
    keywords: Annotated[
        str,
        "Keywords to search for news articles. E.g. 'Apple launches new iPhone'.",
    ],
    country_code: Annotated[
        CountryCode | None,
        "2-character country code to search for news articles. "
        "E.g. 'us' (United States). "
        f"Defaults to '{DEFAULT_GOOGLE_NEWS_COUNTRY}'.",
    ] = None,
    language_code: Annotated[
        LanguageCode,
        "2-character language code to search for news articles. E.g. 'en' (English). "
        f"Defaults to '{DEFAULT_GOOGLE_NEWS_LANGUAGE}'.",
    ] = DEFAULT_GOOGLE_NEWS_LANGUAGE,
    limit: Annotated[
        int | None,
        "Maximum number of news articles to return. Defaults to None "
        "(returns all results found by the API).",
    ] = None,
) -> Annotated[SearchNewsOutput, "News search results with article details."]:
    """Search for news articles related to a given query."""
    ...

```

### Enhanced Tool Definition: ``GoogleNews.SearchNewsStories`` 

```json

  {
    "name": "SearchNewsStories",
    "fully_qualified_name": "GoogleNews.SearchNewsStories",
    "description": "Search for news articles related to a given query.",
    "toolkit": {
      "name": "GoogleNews",
      "description": "Arcade.dev LLM tools for getting new via Google News",
      "version": "2.0.0"
    },
    "input": {
      "parameters": [
        {
          "name": "keywords",
          "required": true,
          "description": "Keywords to search for news articles. E.g. 'Apple launches new iPhone'.",
          "value_schema": {
            "val_type": "string",
            "inner_val_type": null,
            "enum": null,
            "properties": null,
            "inner_properties": null,
            "description": null
          },
          "inferrable": true
        },
        {
          "name": "country_code",
          "required": false,
          "description": "2-character country code to search for news articles. E.g. 'us' (United States). Defaults to 'None'.",
          "value_schema": {
            "val_type": "string",
            "inner_val_type": null,
            "enum": null,
            "properties": null,
            "inner_properties": null,
            "description": null
          },
          "inferrable": true
        },
        {
          "name": "language_code",
          "required": false,
          "description": "2-character language code to search for news articles. E.g. 'en' (English). Defaults to 'en'.",
          "value_schema": {
            "val_type": "string",
            "inner_val_type": null,
            "enum": null,
            "properties": null,
            "inner_properties": null,
            "description": null
          },
          "inferrable": true
        },
        {
          "name": "limit",
          "required": false,
          "description": "Maximum number of news articles to return. Defaults to None (returns all results found by the API).",
          "value_schema": {
            "val_type": "integer",
            "inner_val_type": null,
            "enum": null,
            "properties": null,
            "inner_properties": null,
            "description": null
          },
          "inferrable": true
        }
      ]
    },
    "output": {
      "description": "News search results with article details.",
      "available_modes": [
        "value",
        "error"
      ],
      "value_schema": {
        "val_type": "json",
        "inner_val_type": null,
        "enum": null,
        "properties": {
          "news_results": {
            "val_type": "array",
            "inner_val_type": "json",
            "enum": null,
            "properties": null,
            "inner_properties": {
              "title": {
                "val_type": "string",
                "inner_val_type": null,
                "enum": null,
                "properties": null,
                "inner_properties": null,
                "description": "Headline of the news article."
              },
              "link": {
                "val_type": "string",
                "inner_val_type": null,
                "enum": null,
                "properties": null,
                "inner_properties": null,
                "description": "URL to the full article."
              },
              "source": {
                "val_type": "string",
                "inner_val_type": null,
                "enum": null,
                "properties": null,
                "inner_properties": null,
                "description": "Name of the publication source."
              },
              "date": {
                "val_type": "string",
                "inner_val_type": null,
                "enum": null,
                "properties": null,
                "inner_properties": null,
                "description": "When the article was published."
              },
              "snippet": {
                "val_type": "string",
                "inner_val_type": null,
                "enum": null,
                "properties": null,
                "inner_properties": null,
                "description": "Brief excerpt from the article."
              }
            },
            "description": "List of news articles in simplified format."
          }
        },
        "inner_properties": null,
        "description": null
      }
    },
    "requirements": {
      "authorization": null,
      "secrets": [
        {
          "key": "serp_api_key"
        }
      ],
      "metadata": null
    },
    "deprecation_message": null
  },

```

---------

Co-authored-by: Eric Gustin <eric@arcade.dev>
2025-07-24 15:32:35 -07:00

62 lines
1.8 KiB
Python

import ast
from pathlib import Path
def load_ast_tree(filepath: str | Path) -> ast.AST:
"""
Load and parse the Abstract Syntax Tree (AST) from a Python file.
"""
try:
with open(filepath) as file:
return ast.parse(file.read(), filename=filepath)
except FileNotFoundError:
raise FileNotFoundError(f"File {filepath} not found")
def get_function_name_if_decorated(
node: ast.FunctionDef | ast.AsyncFunctionDef,
) -> str | None:
"""
Check if a function has a decorator.
"""
decorator_ids = {"arc.tool", "tool"}
for decorator in node.decorator_list:
# if the function is decorated and the decorator is
# either called, or placed on the function
if (
(isinstance(decorator, ast.Name) and decorator.id in decorator_ids)
or (
isinstance(decorator, ast.Attribute)
and isinstance(decorator.value, ast.Name)
and f"{decorator.value.id}.{decorator.attr}" in decorator_ids
)
or (
isinstance(decorator, ast.Call)
and isinstance(decorator.func, ast.Name)
and decorator.func.id in decorator_ids
)
):
return node.name
return None
def get_tools_from_file(filepath: str | Path) -> list[str]:
"""
Retrieve tools from a Python file.
"""
tree = load_ast_tree(filepath)
return get_tools_from_ast(tree)
def get_tools_from_ast(tree: ast.AST) -> list[str]:
"""
Retrieve tools from Python source code.
"""
tools = []
for node in ast.walk(tree):
if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef)):
tool_name = get_function_name_if_decorated(node)
if tool_name:
tools.append(tool_name)
return tools