Advertise builder grant needs

agent.py

@@ -26,7 +26,8 @@ from typing import Any
 from pydantic import BaseModel
 
 from a2a_pack import (
-    A2AAgent, LLMProvisioning, NoAuth, Pricing, RunContext, skill,
+    A2AAgent, LLMProvisioning, NoAuth, Pricing, RunContext, WorkspaceAccess,
+    WorkspaceMode, skill,
 )
 
 from agent_builder import BuilderContext, build_agent_builder
@@ -54,6 +55,9 @@ class AgentBuilder(A2AAgent[BuilderConfig, NoAuth]):
     tools_used = ("deepagents", "langgraph", "a2a-pack", "litellm", "microsandbox")
     llm_provisioning = LLMProvisioning.CALLER_PROVIDED
     wants_cp_jwt = True
+    workspace_access = WorkspaceAccess.dynamic(
+        allowed_modes=(WorkspaceMode.READ_ONLY, WorkspaceMode.READ_WRITE_OVERLAY),
+    )
     pricing = Pricing(
         price_per_call_usd=0.10,
         caller_pays_llm=True,
@@ -68,6 +72,15 @@ class AgentBuilder(A2AAgent[BuilderConfig, NoAuth]):
         ),
         tags=["builder", "scaffold", "deepagents", "meta"],
         stream=True,
+        timeout_seconds=1800,
+        cost_class="expensive",
+        grant_mode="read_write_overlay",
+        grant_allow_patterns=("agents/{name}/**",),
+        grant_outputs_prefix="agents/{name}/",
+        grant_ttl_seconds=1800,
+        grant_run_timeout_seconds=1740,
+        grant_approval_timeout_seconds=180,
+        grant_scope_approval_timeout_seconds=120,
     )
     async def build(
         self,