Help the LLM find out which pattern it can use

Signed-off-by: David Gageot <[email protected]>

Author: dgageot

e2e/cagent_exec_test.go

@@ -21,7 +21,7 @@ func TestExec_OpenAI(t *testing.T) {
 func TestExec_OpenAI_ToolCall(t *testing.T) {
 	out := cagentExec(t, "testdata/fs_tools.yaml", "How many files in testdata/working_dir? Only output the number.")
 
-	require.Equal(t, "\n--- Agent: root ---\n\nCalling search_files(\n  path: \"testdata/working_dir\"\n  pattern: \"*\"\n)\n\nsearch_files response → \"2 files found:\\ntestdata/working_dir\\ntestdata/working_dir/README.me\"\n\n2", out)
+	require.Equal(t, "\n--- Agent: root ---\n\nCalling search_files(\n  path: \"testdata/working_dir\"\n  pattern: \"*.*\"\n)\n\nsearch_files response → \"1 files found:\\ntestdata/working_dir/README.me\"\n\n1", out)
 }
 
 func TestExec_OpenAI_gpt5(t *testing.T) {
@@ -75,7 +75,7 @@ func TestExec_Mistral(t *testing.T) {
 func TestExec_Mistral_ToolCall(t *testing.T) {
 	out := cagentExec(t, "testdata/fs_tools.yaml", "--model=mistral/mistral-small", "How many files in testdata/working_dir? Only output the number.")
 
-	require.Equal(t, "\n--- Agent: root ---\n\nCalling list_directory(path: \"testdata/working_dir\")\n\nlist_directory response → \"FILE README.me\\n\"\n\n1", out)
+	require.Equal(t, "\n--- Agent: root ---\n\nCalling list_directory(path: \"testdata/working_dir\")\n\nlist_directory response → \"FILE README.me\\n\"\n\n2", out)
 }
 
 func TestExec_ToolCallsNeedAcceptance(t *testing.T) {

e2e/testdata/cassettes/TestExec_Anthropic_ToolCall.yaml

@@ -328,7 +328,7 @@ func (t *FilesystemTool) Tools(context.Context) ([]tools.Tool, error) {
 		{
 			Name:         ToolNameSearchFiles,
 			Category:     "filesystem",
-			Description:  "Recursively search for files and directories matching a pattern. Prints the full paths of matching files and the total number of files found.",
+			Description:  "Recursively search for files and directories matching a pattern. Prints the full paths of matching files and the total number of files found. The pattern syntax is the same as Go's filepath.Match.",
 			Parameters:   tools.MustSchemaFor[SearchFilesArgs](),
 			OutputSchema: tools.MustSchemaFor[string](),
 			Handler:      t.handleSearchFiles,