feat: add support for google maps grounding

[b4s36t4]

Description: (required)
Adds support for grounding with google maps

Tests Run/Test cases added: (required)

• Add tool with widget, lat and lng
• Tool choice shouldn't breaking

Type of Change:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)

cURL

curl --location 'localhost:8787/v1/chat/completions' \
--header 'x-portkey-api-key: <api_key>' \
--header 'x-portkey-provider: <provider>' \
--header 'Content-Type: application/json' \
--data '{
    "model": "gemini-2.5-flash-lite",
    "messages": [
        {
            "role": "user",
            "content": "What restaurants are nearby?"
        }
    ],
    "tools": [
        {
            "type": "function",
            "function": {
                "name": "googleMaps",
                "description": "Get the restaurants in a given location",
                "parameters": {
                    "enable_widget": true,
                    "retrieval_config": {
                        "latLng": {
                            "latitude": 37.7749,
                            "longitude": -122.4194 // San Francisco
                        }
                    }
                }
            }
        }
    ],
    "tool_choice": "auto"
}'

[Copilot]

Pull request overview

This PR adds support for Google Maps grounding functionality to the Google and Google Vertex AI providers. The implementation allows users to specify geographic coordinates for location-based queries through a new googleMaps tool.

Key changes:

• Added retrievalConfig to GoogleToolConfig interface to support latitude/longitude parameters
• Implemented Google Maps tool detection and configuration in both Google and Vertex AI providers
• Added tool transformation logic to handle the googleMaps tool with widget support

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/providers/google/chatComplete.ts	Added retrievalConfig to GoogleToolConfig interface and implemented Google Maps tool detection/configuration in tool_choice parameter handling
src/providers/google-vertex-ai/utils.ts	Added googleMaps and google_maps to the list of recognized Google tools and implemented transformation logic for Google Maps tool
src/providers/google-vertex-ai/chatComplete.ts	Mirrored Google provider changes for Vertex AI, adding Google Maps tool detection and configuration in tool_choice parameter handling

Comments suppressed due to low confidence (1)

src/providers/google/chatComplete.ts:1

• The Google Maps tool detection logic (lines 338-346) is duplicated from the default function (lines 450-458). Consider extracting this into a helper function to avoid code duplication and improve maintainability.

import { GOOGLE } from '../../globals';

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[Copilot]

The Google Maps tool detection logic (lines 338-346) is duplicated from the default function (lines 307-315). Consider extracting this into a helper function to avoid code duplication and improve maintainability.