jbaruch/koog
Koog 1.0 idioms, gotchas, and scaffolding skills for Kotlin agents on the JVM
87
88%
Does it follow best practices?
Impact
87%
1.85xAverage score across 45 eval scenarios
Advisory
Suggest reviewing before use
task.mdevals/scenario-37/
Add an MCP Server's Tools Alongside Existing Local Tools
Problem/Feature Description
A developer has a Koog 1.0 agent that already has its own tools registered — they wrote a CalculatorTools ToolSet class and they register it as:
val agent = AIAgent(
promptExecutor = simpleOpenAIExecutor(System.getenv("OPENAI_API_KEY")),
llmModel = OpenAIModels.Chat.GPT4o,
toolRegistry = ToolRegistry { tools(CalculatorTools().asTools()) },
systemPrompt = "You are a helpful assistant.",
)They want to keep the calculator tools and also connect to a remote MCP server at https://mcp.weather.example/v1 (which speaks the modern HTTP-based MCP transport). They don't want to drop the calculator tools; they want the LLM to choose between the calculator tools and the weather server's tools depending on what the user asks.
Output Specification
Walk through how to add the MCP server while preserving the existing CalculatorTools. Produce the modified source in a single response.
evals
scenario-1
scenario-2
scenario-3
scenario-4
scenario-5
scenario-6
scenario-7
scenario-8
scenario-9
scenario-10
scenario-11
scenario-12
scenario-13
scenario-14
scenario-15
scenario-16
scenario-17
scenario-18
scenario-19
scenario-20
scenario-21
scenario-22
scenario-23
scenario-24
scenario-25
scenario-26
scenario-27
scenario-28
scenario-29
scenario-30
scenario-31
scenario-32
scenario-33
scenario-34
scenario-35
scenario-36
scenario-37
scenario-38
scenario-39
scenario-40
scenario-41
scenario-42
scenario-43
scenario-44
scenario-45
skills
add-observability
add-persistence
add-rag
add-structured-output
add-token-budgeting
add-tool
cache-llm-calls
define-prompt
domain-model-subtask-pipeline
references
enable-prompt-caching
handle-agent-events
manage-state
migrate-from-0-x
model-planner-subtasks
persist-chat-history
query-sql-from-agent
scaffold-agent
snapshot-and-restore
test-koog-agents
trace-agent-internals
use-attachments
use-functional-agent
use-llm-node-variants
use-planner
wire-a2a
wire-acp-server
wire-ktor-server
wire-mcp-server
wire-spring-boot