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 cloudmonitoring import ( "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-monitoring-query-prometheus" 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 { BaseURL() string Client() *http.Client UserAgent() string } 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"` 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 internally instead of from the config file. allParameters := parameters.Parameters{ parameters.NewStringParameterWithRequired("projectId", "The Id of the Google Cloud project.", true), parameters.NewStringParameterWithRequired("query", "The promql query to execute.", 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 `yaml:"allParams"` manifest tools.Manifest mcpManifest tools.McpManifest } func (t Tool) ToConfig() tools.ToolConfig { return t.Config } 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() projectID, ok := paramsMap["projectId"].(string) if !ok { return nil, fmt.Errorf("projectId parameter not found or not a string") } query, ok := paramsMap["query"].(string) if !ok { return nil, fmt.Errorf("query parameter not found or not a string") } url := fmt.Sprintf("%s/v1/projects/%s/location/global/prometheus/api/v1/query", source.BaseURL(), projectID) req, err := http.NewRequest(http.MethodGet, url, nil) if err != nil { return nil, err } q := req.URL.Query() q.Add("query", query) req.URL.RawQuery = q.Encode() req.Header.Set("User-Agent", source.UserAgent()) resp, err := source.Client().Do(req) if err != nil { return nil, err } defer resp.Body.Close() body, 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("request failed: %s, body: %s", resp.Status, string(body)) } if len(body) == 0 { return nil, nil } var result map[string]any if err := json.Unmarshal(body, &result); err != nil { return nil, fmt.Errorf("failed to unmarshal json: %w, body: %s", err, string(body)) } 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 true } func (t Tool) RequiresClientAuthorization(resourceMgr tools.SourceProvider) (bool, error) { return false, nil } func (t Tool) GetAuthTokenHeaderName(resourceMgr tools.SourceProvider) (string, error) { return "Authorization", nil }