package metadataquery
import (
"context"
"github.com/modelcontextprotocol/go-sdk/mcp"
v1 "github.com/prometheus/client_golang/api/prometheus/v1"
)
// URL query parameters:
// match_target=<label_selectors>: Label selectors that match targets by their label sets. All targets are selected if left empty.
// metric=<string>: A metric name to retrieve metadata for. All metric metadata is retrieved if left empty.
// limit=<number>: Maximum number of targets to match.
// The following example returns all metadata entries for the go_goroutines metric from the first two targets with label job="prometheus".
//
// curl -G http://localhost:9091/api/v1/targets/metadata \
// --data-urlencode 'metric=go_goroutines' \
// --data-urlencode 'match_target={job="prometheus"}' \
// --data-urlencode 'limit=2'
type TargetMetadataQueryParams struct {
MatchTarget string `json:"match_target,omitzero" jsonschema:"<label_selectors>: Label selectors that match targets by their label sets. All targets are selected if left empty."`
Metric string `json:"metric,omitzero" jsonschema:"<string>: A metric name to retrieve metadata for. All metric metadata is retrieved if left empty."`
Limit string `json:"limit,omitzero" jsonschema:"<number>: Maximum number of targets to match."`
}
type TargetMetadataQueryResult struct {
Data []v1.MetricMetadata `json:"data"`
}
func (d *metadataQuerier) TargetMetadataQueryHandler(ctx context.Context, request *mcp.CallToolRequest, input *TargetMetadataQueryParams) (*mcp.CallToolResult, *TargetMetadataQueryResult, error) {
var (
result = &TargetMetadataQueryResult{}
err error
)
if result.Data, err = d.API.TargetsMetadata(
ctx,
input.MatchTarget,
input.Metric,
input.Limit,
); err != nil {
return nil, nil, err
}
return nil, result, nil
}
