fix(omp): expose injected Paseo tools directly (#2418)

packages/server/src/server/agent/providers/omp/host-tools.test.ts

@@ -128,7 +128,7 @@ class OmpHostToolHarness {
 }
 
 describe("OMP host tools", () => {
-  test("serializes the caller-scoped Paseo catalog for set_host_tools", () => {
+  test("marks every caller-scoped Paseo tool essential for direct invocation", () => {
     const catalog = createCatalog([
       {
         name: "create_agent",
@@ -137,6 +137,11 @@ describe("OMP host tools", () => {
         inputSchema: { initialPrompt: z.string().describe("Prompt for the new agent.") },
         handler: async () => ({ content: [] }),
       },
+      {
+        name: "browser_list_tabs",
+        description: "List browser tabs.",
+        handler: async () => ({ content: [] }),
+      },
     ]);
 
     expect(serializeOmpHostTools(catalog)).toEqual([
@@ -144,8 +149,15 @@ describe("OMP host tools", () => {
         name: "create_agent",
         label: "Create agent",
         description: "Create a Paseo agent.",
+        loadMode: "essential",
         parameters: expect.objectContaining({ type: "object", required: ["initialPrompt"] }),
       },
+      {
+        name: "browser_list_tabs",
+        description: "List browser tabs.",
+        loadMode: "essential",
+        parameters: expect.objectContaining({ type: "object" }),
+      },
     ]);
   });
 

packages/server/src/server/agent/providers/omp/host-tools.ts

@@ -35,6 +35,7 @@ export function serializeOmpHostTools(catalog: PaseoToolCatalog): OmpRpcHostTool
     const definition: OmpRpcHostToolDefinition = {
       name: tool.name,
       description: tool.description,
+      loadMode: "essential",
       parameters: serializePaseoToolInputParameters(tool),
     };
     if (tool.title) {

packages/server/src/server/agent/providers/omp/rpc-types.ts

@@ -178,6 +178,7 @@ export const OmpRpcHostToolDefinitionSchema = z
     name: z.string(),
     label: z.string().optional(),
     description: z.string(),
+    loadMode: z.enum(["essential", "discoverable"]).optional(),
     parameters: z.record(z.string(), z.unknown()),
     hidden: z.boolean().optional(),
   })