fix(esmole): truncate all tool responses; guard normalizes leading slash

packages/esmole-mcp/test/unit/tools/register.test.ts

@@ -149,4 +149,42 @@ describe('registerEsTools', () => {
         expect(calls[0].path).toBe('/_cluster/health')
         expect(isCallToolResult(res)).toBe(true)
     })
+
+    it('es_list_indices truncates an over-budget body', async () => {
+        const big = Array.from({ length: 8000 }, (_, i) => ({
+            index: 'index_with_a_fairly_long_name_' + i,
+            health: 'green'
+        }))
+        const calls: RequestCall[] = []
+        const { handlers, server } = fakeServer()
+        registerEsTools(server, fakeManager(calls, big))
+        const handler = handlers.get('es_list_indices')
+        if (handler === undefined) {
+            throw new Error('es_list_indices not registered')
+        }
+        const res = await handler({ connection: 'c', pattern: '*' })
+        expect(isCallToolResult(res)).toBe(true)
+        const payload = JSON.parse((res.content as Array<{ text: string }>)[0].text)
+        expect(payload.truncated).toBe(true)
+        expect(payload.body._truncated).toBe(true)
+    })
+
+    it('es_cluster_health truncates an over-budget body', async () => {
+        const big: Record<string, string> = {}
+        for (let i = 0; i < 8000; i++) {
+            big['node_with_a_fairly_long_name_' + i] = 'some descriptive value ' + i
+        }
+        const calls: RequestCall[] = []
+        const { handlers, server } = fakeServer()
+        registerEsTools(server, fakeManager(calls, big))
+        const handler = handlers.get('es_cluster_health')
+        if (handler === undefined) {
+            throw new Error('es_cluster_health not registered')
+        }
+        const res = await handler({ connection: 'c' })
+        expect(isCallToolResult(res)).toBe(true)
+        const payload = JSON.parse((res.content as Array<{ text: string }>)[0].text)
+        expect(payload.truncated).toBe(true)
+        expect(payload.body._truncated).toBe(true)
+    })
 })