fix(backend/copilot): remove duplicate credential guidance from tool descriptions, fix guide to distinguish missing vs valid-update case

autogpt_platform/backend/backend/copilot/sdk/agent_generation_guide.md

@@ -135,12 +135,14 @@ inputs or see outputs. NEVER skip them.
   output to the consuming block's input.
 - **Credentials**: Do NOT require credentials upfront. Users configure
   credentials later in the platform UI after the agent is saved.
-  When the user just needs to connect or update credentials for an
-  existing agent, do NOT call `create_agent` / `edit_agent` and do NOT
-  redirect them to the Builder — call `run_agent` (it surfaces the
-  inline credentials-setup card automatically) or `connect_integration`
-  (for a standalone setup card scoped to one provider). Both keep the
-  user in the chat.
+  When the user needs to connect credentials for an existing agent (never
+  connected, or credentials expired/invalidated), do NOT call
+  `create_agent` / `edit_agent` — call `run_agent` instead (it gates on
+  missing/invalid credentials before executing and surfaces the inline
+  setup card) or `connect_integration` (standalone setup card scoped to
+  one provider, no execution). When the user just wants to update or
+  swap credentials that are already valid, use `connect_integration` —
+  `run_agent` would execute the agent, not just update credentials.
 - **Node spacing**: Position nodes with at least 800 X-units between them.
 - **Nested properties**: Use `parentField_#_childField` notation in link
   sink_name/source_name to access nested object fields.

autogpt_platform/backend/backend/copilot/tools/create_agent.py

@@ -24,9 +24,7 @@ class CreateAgentTool(BaseTool):
     def description(self) -> str:
         return (
             "Create a new agent from JSON (nodes + links). Validates, auto-fixes, and saves. "
-            "Before calling, search for existing agents with find_library_agent. "
-            "Do NOT use this to connect credentials for an existing agent — call run_agent "
-            "instead (it surfaces the inline credential-setup card automatically)."
+            "Before calling, search for existing agents with find_library_agent."
         )
 
     @property

autogpt_platform/backend/backend/copilot/tools/edit_agent.py

@@ -24,9 +24,7 @@ class EditAgentTool(BaseTool):
     def description(self) -> str:
         return (
             "Edit an existing agent. Validates, auto-fixes, and saves. "
-            "Before calling, search for existing agents with find_library_agent. "
-            "Do NOT use this to connect credentials for an existing agent — call run_agent "
-            "instead (it surfaces the inline credential-setup card automatically)."
+            "Before calling, search for existing agents with find_library_agent."
         )
 
     @property