fix(cortex-engine): align tool handler names with registry expectations (#237)

The ToolHandler::name() method for several handlers returned incorrect values,
causing 'Tool not implemented' errors when the registry looked up handlers by name:

- LocalShellHandler: 'Shell' -> 'Execute' (registered as 'Execute')
- GrepHandler: 'Search' -> 'Grep' (registered as 'Grep')
- GlobHandler: 'Find' -> 'Glob' (registered as 'Glob')
- FetchUrlHandler: 'Fetch' -> 'FetchUrl' (registered as 'FetchUrl')

The handler names must match the keys used in the handlers HashMap for proper
dispatch in ToolRegistry::execute_with_context().

Co-authored-by: Droid Agent <droid@factory.ai>

Author: echobt

cortex-engine/src/tools/handlers/fetch_url.rs

@@ -147,7 +147,7 @@ impl Default for FetchUrlHandler {
 #[async_trait]
 impl ToolHandler for FetchUrlHandler {
     fn name(&self) -> &str {
-        "Fetch"
+        "FetchUrl"
     }
 
     async fn execute(&self, arguments: Value, _context: &ToolContext) -> Result<ToolResult> {
@@ -196,7 +196,7 @@ mod tests {
     #[test]
     fn test_handler_creation() {
         let handler = FetchUrlHandler::new();
-        assert_eq!(handler.name(), "Fetch");
+        assert_eq!(handler.name(), "FetchUrl");
     }
 
     #[test]

cortex-engine/src/tools/handlers/glob.rs

@@ -36,7 +36,7 @@ impl Default for GlobHandler {
 #[async_trait]
 impl ToolHandler for GlobHandler {
     fn name(&self) -> &str {
-        "Find"
+        "Glob"
     }
 
     async fn execute(&self, arguments: Value, context: &ToolContext) -> Result<ToolResult> {

cortex-engine/src/tools/handlers/grep.rs

@@ -59,7 +59,7 @@ impl Default for GrepHandler {
 #[async_trait]
 impl ToolHandler for GrepHandler {
     fn name(&self) -> &str {
-        "Search"
+        "Grep"
     }
 
     async fn execute(&self, arguments: Value, context: &ToolContext) -> Result<ToolResult> {

cortex-engine/src/tools/handlers/local_shell.rs

@@ -99,7 +99,7 @@ impl Default for LocalShellHandler {
 #[async_trait]
 impl ToolHandler for LocalShellHandler {
     fn name(&self) -> &str {
-        "Shell"
+        "Execute"
     }
 
     async fn execute(&self, arguments: Value, context: &ToolContext) -> Result<ToolResult> {