curl --request PUT \
  --url https://api.{domain}/v1/sessions/{session_id}/tools \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "tools": [
    {
      "type": "function",
      "name": "lookup_order",
      "description": "Look up an order.",
      "parameters": {
        "type": "object",
        "properties": {
          "order_id": {
            "type": "string"
          }
        },
        "required": [
          "order_id"
        ]
      }
    }
  ]
}
'

import requests

url = "https://api.{domain}/v1/sessions/{session_id}/tools"

payload = { "tools": [
        {
            "type": "function",
            "name": "lookup_order",
            "description": "Look up an order.",
            "parameters": {
                "type": "object",
                "properties": { "order_id": { "type": "string" } },
                "required": ["order_id"]
            }
        }
    ] }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.put(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    tools: [
      {
        type: 'function',
        name: 'lookup_order',
        description: 'Look up an order.',
        parameters: {
          type: 'object',
          properties: {order_id: {type: 'string'}},
          required: ['order_id']
        }
      }
    ]
  })
};

fetch('https://api.{domain}/v1/sessions/{session_id}/tools', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.{domain}/v1/sessions/{session_id}/tools",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'tools' => [
        [
                'type' => 'function',
                'name' => 'lookup_order',
                'description' => 'Look up an order.',
                'parameters' => [
                                'type' => 'object',
                                'properties' => [
                                                                'order_id' => [
                                                                                                                                'type' => 'string'
                                                                ]
                                ],
                                'required' => [
                                                                'order_id'
                                ]
                ]
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.{domain}/v1/sessions/{session_id}/tools"

	payload := strings.NewReader("{\n  \"tools\": [\n    {\n      \"type\": \"function\",\n      \"name\": \"lookup_order\",\n      \"description\": \"Look up an order.\",\n      \"parameters\": {\n        \"type\": \"object\",\n        \"properties\": {\n          \"order_id\": {\n            \"type\": \"string\"\n          }\n        },\n        \"required\": [\n          \"order_id\"\n        ]\n      }\n    }\n  ]\n}")

	req, _ := http.NewRequest("PUT", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.put("https://api.{domain}/v1/sessions/{session_id}/tools")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"tools\": [\n    {\n      \"type\": \"function\",\n      \"name\": \"lookup_order\",\n      \"description\": \"Look up an order.\",\n      \"parameters\": {\n        \"type\": \"object\",\n        \"properties\": {\n          \"order_id\": {\n            \"type\": \"string\"\n          }\n        },\n        \"required\": [\n          \"order_id\"\n        ]\n      }\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.{domain}/v1/sessions/{session_id}/tools")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"tools\": [\n    {\n      \"type\": \"function\",\n      \"name\": \"lookup_order\",\n      \"description\": \"Look up an order.\",\n      \"parameters\": {\n        \"type\": \"object\",\n        \"properties\": {\n          \"order_id\": {\n            \"type\": \"string\"\n          }\n        },\n        \"required\": [\n          \"order_id\"\n        ]\n      }\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "object": "session.tools",
  "session_id": "<string>",
  "tools": [
    {
      "type": "mcp",
      "name": "<string>",
      "url": "<string>",
      "command": "<string>",
      "args": [
        "<string>"
      ],
      "allowed_tools": [
        "<string>"
      ],
      "required": true,
      "redacted": [
        "<string>"
      ],
      "description": "<string>",
      "parameters": {},
      "timeout_seconds": 123
    }
  ],
  "text": {
    "verbosity": "low",
    "format": {}
  }
}

{
  "error": {
    "code": "invalid_request",
    "message": "<string>",
    "request_id": "<string>"
  }
}

{
  "error": {
    "code": "invalid_request",
    "message": "<string>",
    "request_id": "<string>"
  }
}

{
  "error": {
    "code": "invalid_request",
    "message": "<string>",
    "request_id": "<string>"
  }
}

{
  "error": {
    "code": "invalid_request",
    "message": "<string>",
    "request_id": "<string>"
  }
}

{
  "error": {
    "code": "invalid_request",
    "message": "<string>",
    "request_id": "<string>"
  }
}

{
  "error": {
    "code": "invalid_request",
    "message": "<string>",
    "request_id": "<string>"
  }
}

{
  "error": {
    "code": "invalid_request",
    "message": "<string>",
    "request_id": "<string>"
  }
}