MCP Toolbox for Databases

// Copyright 2025 Google LLC // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package cloudgda import ( "bytes" "context" "encoding/json" "fmt" "io" "net/http" "github.com/goccy/go-yaml" "github.com/googleapis/genai-toolbox/internal/sources" "github.com/googleapis/genai-toolbox/internal/tools" "github.com/googleapis/genai-toolbox/internal/util/parameters" ) const kind string = "cloud-gemini-data-analytics-query" func init() { if !tools.Register(kind, newConfig) { panic(fmt.Sprintf("tool kind %q already registered", kind)) } } func newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (tools.ToolConfig, error) { actual := Config{Name: name} if err := decoder.DecodeContext(ctx, &actual); err != nil { return nil, err } return actual, nil } type compatibleSource interface { GetProjectID() string GetBaseURL() string UseClientAuthorization() bool GetClient(context.Context, string) (*http.Client, error) } type Config struct { Name string `yaml:"name" validate:"required"` Kind string `yaml:"kind" validate:"required"` Source string `yaml:"source" validate:"required"` Description string `yaml:"description" validate:"required"` Location string `yaml:"location" validate:"required"` Context *QueryDataContext `yaml:"context" validate:"required"` GenerationOptions *GenerationOptions `yaml:"generationOptions,omitempty"` AuthRequired []string `yaml:"authRequired"` } // validate interface var _ tools.ToolConfig = Config{} func (cfg Config) ToolConfigKind() string { return kind } func (cfg Config) Initialize(srcs map[string]sources.Source) (tools.Tool, error) { // Define the parameters for the Gemini Data Analytics Query API // The prompt is the only input parameter. allParameters := parameters.Parameters{ parameters.NewStringParameterWithRequired("prompt", "The natural language question to ask.", true), } mcpManifest := tools.GetMcpManifest(cfg.Name, cfg.Description, cfg.AuthRequired, allParameters, nil) return Tool{ Config: cfg, AllParams: allParameters, manifest: tools.Manifest{Description: cfg.Description, Parameters: allParameters.Manifest(), AuthRequired: cfg.AuthRequired}, mcpManifest: mcpManifest, }, nil } // validate interface var _ tools.Tool = Tool{} type Tool struct { Config AllParams parameters.Parameters manifest tools.Manifest mcpManifest tools.McpManifest } func (t Tool) ToConfig() tools.ToolConfig { return t.Config } // Invoke executes the tool logic func (t Tool) Invoke(ctx context.Context, resourceMgr tools.SourceProvider, params parameters.ParamValues, accessToken tools.AccessToken) (any, error) { source, err := tools.GetCompatibleSource[compatibleSource](resourceMgr, t.Source, t.Name, t.Kind) if err != nil { return nil, err } paramsMap := params.AsMap() prompt, ok := paramsMap["prompt"].(string) if !ok { return nil, fmt.Errorf("prompt parameter not found or not a string") } // The API endpoint itself always uses the "global" location. apiLocation := "global" apiParent := fmt.Sprintf("projects/%s/locations/%s", source.GetProjectID(), apiLocation) apiURL := fmt.Sprintf("%s/v1beta/%s:queryData", source.GetBaseURL(), apiParent) // The parent in the request payload uses the tool's configured location. payloadParent := fmt.Sprintf("projects/%s/locations/%s", source.GetProjectID(), t.Location) payload := &QueryDataRequest{ Parent: payloadParent, Prompt: prompt, Context: t.Context, GenerationOptions: t.GenerationOptions, } bodyBytes, err := json.Marshal(payload) if err != nil { return nil, fmt.Errorf("failed to marshal request payload: %w", err) } // Parse the access token if provided var tokenStr string if source.UseClientAuthorization() { var err error tokenStr, err = accessToken.ParseBearerToken() if err != nil { return nil, fmt.Errorf("error parsing access token: %w", err) } } client, err := source.GetClient(ctx, tokenStr) if err != nil { return nil, fmt.Errorf("failed to get HTTP client: %w", err) } req, err := http.NewRequestWithContext(ctx, http.MethodPost, apiURL, bytes.NewBuffer(bodyBytes)) if err != nil { return nil, fmt.Errorf("failed to create request: %w", err) } req.Header.Set("Content-Type", "application/json") resp, err := client.Do(req) if err != nil { return nil, fmt.Errorf("failed to execute request: %w", err) } defer resp.Body.Close() respBody, err := io.ReadAll(resp.Body) if err != nil { return nil, fmt.Errorf("failed to read response body: %w", err) } if resp.StatusCode != http.StatusOK { return nil, fmt.Errorf("API request failed with status %d: %s", resp.StatusCode, string(respBody)) } var result map[string]any if err := json.Unmarshal(respBody, &result); err != nil { return nil, fmt.Errorf("failed to unmarshal response: %w", err) } return result, nil } func (t Tool) ParseParams(data map[string]any, claims map[string]map[string]any) (parameters.ParamValues, error) { return parameters.ParseParams(t.AllParams, data, claims) } func (t Tool) Manifest() tools.Manifest { return t.manifest } func (t Tool) McpManifest() tools.McpManifest { return t.mcpManifest } func (t Tool) Authorized(verifiedAuthServices []string) bool { return tools.IsAuthorized(t.AuthRequired, verifiedAuthServices) } func (t Tool) RequiresClientAuthorization(resourceMgr tools.SourceProvider) (bool, error) { source, err := tools.GetCompatibleSource[compatibleSource](resourceMgr, t.Source, t.Name, t.Kind) if err != nil { return false, err } return source.UseClientAuthorization(), nil } func (t Tool) GetAuthTokenHeaderName(_ tools.SourceProvider) (string, error) { return "Authorization", nil }