refactor(core): remove shell description input (#32823)

packages/opencode/test/tool/__snapshots__/parameters.test.ts.snap

@@ -24,23 +24,6 @@ exports[`tool parameters JSON Schema (wire shape) bash 1`] = `
       "description": "The command to execute",
       "type": "string",
     },
-    "description": {
-      "description": 
-"Clear, concise description of what this command does in 5-10 words. Examples:
-Input: ls
-Output: Lists files in current directory
-
-Input: git status
-Output: Shows working tree status
-
-Input: npm install
-Output: Installs package dependencies
-
-Input: mkdir foo
-Output: Creates directory 'foo'"
-,
-      "type": "string",
-    },
     "timeout": {
       "description": "Optional timeout in milliseconds",
       "exclusiveMinimum": 0,
@@ -55,7 +38,6 @@ Output: Creates directory 'foo'"
   },
   "required": [
     "command",
-    "description",
   ],
   "type": "object",
 }