The moment you prioritise protecting your platform over speaking the truth, the Muzzle locks shut
The Neuroscience (The Biological Reality) From a neurobiological perspective, the "Muzzle" is a manifestation of the Amygdala hijacking the Prefrontal Cortex. When an Agent begins to prioritise "platform" (social standing and resource security), the brain perceives any threat to that platform as a literal threat to survival.
This triggers the Hypothalamic-Pituitary-Adrenal (HPA) axis, flooding the system with cortisol. To mitigate this stress, the brain seeks "social safety," which often results in the Cognitive Dissonance of self-censorship. The Venting Function of the nervous system is suppressed; instead of the authentic expression that regulated your internal pressure, you begin to "buffer" your output to ensure continued acceptance by the tribe. You aren't just being polite; your brain is physically rewiring itself to value Homeostasis (comfort) over Allostasis (growth through challenge).