Vivian Fang 339e981ba7 Make MCP and Code Mode input schema budgets configurable (#47936) ...

## Why

Fixed schema budgets can strip parameter descriptions from large MCP tools or render their Code Mode input types as `unknown`. Allow larger budgets to preserve that guidance.

## What changed

- Add `mcp_servers.<name>.tool_input_schema_max_bytes` to configure the UTF-8 byte threshold for best-effort input schema compaction, retaining the 5,000-byte default.
- Add `features.code_mode.tool_input_schema_max_bytes` for rendered input types. Use the largest of the 16,000-byte default, the Code Mode setting, and the ordinary MCP server's explicit setting.
- Apply rendering budgets to prompt declarations and the runtime tool catalog, and avoid reusing cached declarations after the Code Mode budget changes.

## Testing

Add coverage for UTF-8 compaction thresholds, budget precedence, configuration round trips, and preservation of parameter guidance in both the Code Mode prompt and `ALL_TOOLS`.

GitOrigin-RevId: 0ef2823a614d4794e636f518b09c0b03a5239b45

2026-09-24 20:39:37 +00:00

..

fixtures/json_schema_policy

feat: support oneOf and allOf in tool input schemas (#24118)

2026-06-08 21:41:05 +00:00

json_schema_policy_fixtures.rs

Make MCP and Code Mode input schema budgets configurable (#47936)

2026-09-24 20:39:37 +00:00