// Copyright 2026 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.

syntax = "proto3";

package google.cloud.ces.v1;

import "google/api/field_behavior.proto";
import "google/cloud/ces/v1/schema.proto";

option go_package = "cloud.google.com/go/ces/apiv1/cespb;cespb";
option java_multiple_files = true;
option java_outer_classname = "ClientFunctionProto";
option java_package = "com.google.cloud.ces.v1";

// Represents a client-side function that the agent can invoke. When the
// tool is chosen by the agent, control is handed off to the client.
// The client is responsible for executing the function and returning the result
// as a [ToolResponse][google.cloud.ces.v1.ToolResponse] to continue the
// interaction with the agent.
message ClientFunction {
  // Required. The function name.
  string name = 1 [(google.api.field_behavior) = REQUIRED];

  // Optional. The function description.
  string description = 2 [(google.api.field_behavior) = OPTIONAL];

  // Optional. The schema of the function parameters.
  Schema parameters = 3 [(google.api.field_behavior) = OPTIONAL];

  // Optional. The schema of the function response.
  Schema response = 4 [(google.api.field_behavior) = OPTIONAL];
}