Malcanthet had specifically summoned Solam to deal with the Queen of Chaos and Shami-Amour. Though Malcanthet was highly confident in the secrecy of the information, it never hurt to be prepared. Naturally, the other demon lords were also targets of her vigilance.
Seeking out Solam had also been the result of careful consideration on Malcanthet's part. In terms of personal connections, Solam was exceptionally clean. He had no ties to Obox-Ob, Demogorgon, or Graz'zt. At most, he had some minor entanglement with Shami-Amour.
Malcanthet had carefully considered that point as well and concluded that Solam was trustworthy. The reason was simple: it had been Solam who revealed the cooperation between the Queen of Chaos and Shami-Amour! If Solam had not taken the initiative to inform Malcanthet, she could never have learned so quickly that the Queen of Chaos and Shami-Amour were colluding.
It was precisely because Solam had proactively leaked the news that the Queen of Chaos and Shami-Amour's scheme had been exposed, leaving the Queen of Chaos hunted everywhere to this day. Without Solam's leak, the Queen of Chaos could have secretly gathered the Rod of Seven Parts without anyone noticing. After all, the Abyss had forgotten the Queen of Chaos for countless centuries; without exceptional circumstances, no one would have thought of her.
Had the plan truly developed as intended, the Queen of Chaos could have suddenly caught the entire Abyss off guard with Miska the Wolf-Spider.
But now, none of that was possible. They could only hide everywhere like stray dogs. More importantly, they had lost the initiative. Did they really think Miska the Wolf-Spider's return alone would let them conquer everything? How could that be possible? If that were the case, then how had the Queen of Chaos unified the Abyss back when she did not