recv: cap batch size at 5, default stays 1 (#2150 clarified)

hive-ag3nt/src/mcp.rs

@@ -613,7 +613,7 @@ pub struct RecvArgs {
     /// Maximum number of messages to pop in this round-trip. Default
     /// (None) is 1 (single-message behaviour — exactly what you want
     /// when you're called to drive a turn off the first wake). Pass
-    /// a higher value (capped at 32 server-side) when you've been
+    /// a higher value (capped at 5 server-side) when you've been
     /// told the inbox has more queued (the wake prompt mentions
     /// pending count) and want to drain everything in one tool call.
     /// Once the long-poll wakes up, the call drains up to `max` in
@@ -806,7 +806,7 @@ impl AgentServer {
             `wait_seconds` (capped at 180) to park the turn waiting for new work — incoming \
             messages wake you instantly, otherwise the call returns empty at the timeout. \
             That's strictly better than a fixed shell `sleep`. \n\n\
-            **Batch drain**: pass `max: N` (capped at 32) to drain up to N messages in one \
+            **Batch drain**: pass `max: N` (capped at 5) to drain up to N messages in one \
             round-trip. Use this when the wake prompt told you the inbox has more queued, or \
             any time you expect a burst — one tool call beats N consecutive single recvs. \
             `wait_seconds` still applies to the FIRST message; once one arrives the call drains \