Add tool calling support for Gemini models (#27772)

Release Notes:

- N/A

crates/assistant_tools/src/symbol_info_tool.rs

@@ -2,7 +2,7 @@ use anyhow::{anyhow, Context as _, Result};
 use assistant_tool::{ActionLog, Tool};
 use gpui::{App, AsyncApp, Entity, Task};
 use language::{self, Anchor, Buffer, BufferSnapshot, Location, Point, ToPoint, ToPointUtf16};
-use language_model::LanguageModelRequestMessage;
+use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -10,6 +10,8 @@ use std::{fmt::Write, ops::Range, sync::Arc};
 use ui::IconName;
 use util::markdown::MarkdownString;
 
+use crate::schema::json_schema_for;
+
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct SymbolInfoToolInput {
     /// The relative path to the file containing the symbol.
@@ -82,9 +84,8 @@ impl Tool for SymbolInfoTool {
         IconName::Eye
     }
 
-    fn input_schema(&self) -> serde_json::Value {
-        let schema = schemars::schema_for!(SymbolInfoToolInput);
-        serde_json::to_value(&schema).unwrap()
+    fn input_schema(&self, format: LanguageModelToolSchemaFormat) -> serde_json::Value {
+        json_schema_for::<SymbolInfoToolInput>(format)
     }
 
     fn ui_text(&self, input: &serde_json::Value) -> String {