Guides
Workflows: configure a capability once, call it by name
A workflow turns several endpoints, from one service or many, into one named capability your agent can call. How brief works, and when to…
2 min read
Blog
tool-calling
Engineering
Context engineering: what goes into your agent’s window
Instructions, input, tool definitions and tool results all compete for the same context window. Four habits that keep it full of what matters.
2 min read
Engineering
Inside run(): how the tool-calling loop works
Making a tool available is not the same as calling it. A walk through one run() request: the model, the instructions, the tools, and…
2 min read
Guides
Writing tool descriptions models actually follow
The model chooses a tool from its name, description and inputs, nothing else. Six rules for tool definitions that lead to the right call.
2 min read
Engineering
Connectors and tools: what your model actually sees
A connector is access to a service. A tool is a capability the model can call. The difference shapes what your model sees, and…
2 min read
Engineering
Tool calling, from first principles
A model cannot call anything. It writes a structured request and something else executes it. How the exchange works, and where Agent200 sits in…
2 min read
200 OK
Build the agent.
Access everything it needs.
Bring the agent you already have. Agent200 provides and executes its external capabilities.