feat: Enable frontend tools (#1778)

crates/goose/src/agents/agent.rs

@@ -12,8 +12,7 @@ use super::extension::{ExtensionConfig, ExtensionResult};
 use crate::message::Message;
 use crate::providers::base::Provider;
 use crate::session;
-use mcp_core::prompt::Prompt;
-use mcp_core::protocol::GetPromptResult;
+use mcp_core::{prompt::Prompt, protocol::GetPromptResult, Content, ToolResult};
 
 /// Session configuration for an agent
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -68,4 +67,7 @@ pub trait Agent: Send + Sync {
 
     /// Get a reference to the provider used by this agent
     async fn provider(&self) -> Arc<Box<dyn Provider>>;
+
+    /// Handle a tool result from the frontend
+    async fn handle_tool_result(&self, id: String, result: ToolResult<Vec<Content>>);
 }