Keep a machine's discovery answer under the bus's message limit

Every tool's schema in one $SRV.INFO reply outgrew max_payload on machines
serving 137-206 tools, and the refused reply was dropped silently, so search
and a machine's view went empty. Module tools now announce without schema;
describe and tools/list ask the module for it. An answer still too large has
its descriptions cut to a line, and a failed reply is logged.

node-tools/test/fixtures/many-beta.mjs

@@ -3,7 +3,7 @@
 import { registerModuleTools } from "@novox/mesh-sdk/tools";
 
 registerModuleTools("beta", () => [
-  { name: "three", description: "beta's", input: {}, run: async () => ({ beta: 3 }) },
+  { name: "three", description: "beta's", input: { verbose: { type: "boolean", description: "say more" } }, run: async () => ({ beta: 3 }) },
   { name: "four", description: "beta's", input: {}, run: async () => ({ beta: 4 }) },
   { name: "five", description: "beta's", input: {}, run: async () => ({ beta: 5 }) },
 ]);