The config.schema endpoint returns a 373KB JSON schema designed for
Control UI form rendering, not for agent consumption. When agents
called this action, it caused context explosion issues.
Changes:
- Remove config.schema from GATEWAY_ACTIONS in gateway-tool.ts
- Update system prompt to remove config.schema reference
- Add config.patch to system prompt documentation
The underlying config.schema endpoint remains available for Control UI
via the internal callGatewayTool function.
Fixes#7347