wip(backend/tool): tool collection and execution is now agents job

backend/src/agent.py

@@ -183,6 +183,18 @@ class Agent:
         return [r for r in self.resources
                 if r.kind == kind and (key is None or r.key == key)]
 
+    def get_tools(self, run=None):
+        """Collect the tools available to this agent.
+
+        Returns the agent-configured tools (derived from its resources) plus
+        any remote tools referenced by the run input. When a run is given,
+        remote names in ``run.input['remotes']`` are resolved and appended.
+        """
+        tools = list(self.tools)
+        if run is not None and 'remotes' in run.input:
+            tools += self.app.getRemoteTools(self.user_id, run.input['remotes'])
+        return tools
+
 
 class DebugAgent(Agent):
     identifier = "debug"