"Call this when…" — what the tool does and when to use it. At most 1024 characters.
JSON Schema for the arguments, in the cross-provider subset.
The tool name the model calls: lowercase letters, digits and underscores, at most 64
characters. Must not be a control-tool name or start with delegate_to_.
Runs the call. A thrown error is reported to the model as an error result.
One agent-local tool.