Add output_schema to code mode render (#17210)

This updates code-mode tool rendering so MCP tools can surface
structured output types from their `outputSchema`.

What changed:
- Detect MCP tool-call result wrappers from the output schema shape
instead of relying on tool-name parsing or provenance flags.
- Render shared TypeScript aliases once for MCP tool results
(`CallToolResult`, `ContentBlock`, etc.) so multiple MCP tool
declarations stay compact.
- Type `structuredContent` from the tool definition's `outputSchema`
instead of rendering it as `unknown`.
- Update the shared MCP aliases to match the MCP draft `CallToolResult`
schema more closely.

Example:
- Before: `declare const tools: { mcp__rmcp__echo(args: { env_var?:
string; message: string; }): Promise<{ _meta?: unknown; content:
Array<unknown>; isError?: boolean; structuredContent?: unknown; }>; };`
- After: `declare const tools: { mcp__rmcp__echo(args: { env_var?:
string; message: string; }): Promise<CallToolResult<{ echo: string; env:
string | null; }>>; };`

codex-rs/tools/src/code_mode.rs

@@ -49,6 +49,19 @@ pub fn collect_code_mode_tool_definitions<'a>(
     tool_definitions
 }
 
+pub fn collect_code_mode_exec_prompt_tool_definitions<'a>(
+    specs: impl IntoIterator<Item = &'a ToolSpec>,
+) -> Vec<CodeModeToolDefinition> {
+    let mut tool_definitions = specs
+        .into_iter()
+        .filter_map(code_mode_tool_definition_for_spec)
+        .filter(|definition| codex_code_mode::is_code_mode_nested_tool(&definition.name))
+        .collect::<Vec<_>>();
+    tool_definitions.sort_by(|left, right| left.name.cmp(&right.name));
+    tool_definitions.dedup_by(|left, right| left.name == right.name);
+    tool_definitions
+}
+
 pub fn create_wait_tool() -> ToolSpec {
     let properties = BTreeMap::from([
         (
@@ -95,7 +108,7 @@ pub fn create_wait_tool() -> ToolSpec {
 }
 
 pub fn create_code_mode_tool(
-    enabled_tools: &[(String, String)],
+    enabled_tools: &[CodeModeToolDefinition],
     namespace_descriptions: &BTreeMap<String, codex_code_mode::ToolNamespaceDescription>,
     code_mode_only_enabled: bool,
 ) -> ToolSpec {