diff --git a/crates/aldabra-mcp/src/tools.rs b/crates/aldabra-mcp/src/tools.rs
index 26d4efc..a7b4bcb 100644
--- a/crates/aldabra-mcp/src/tools.rs
+++ b/crates/aldabra-mcp/src/tools.rs
@@ -1310,7 +1310,7 @@ impl WalletService {
 
     #[tool(
         name = "dao_register",
-        description = "Register a DAO config (Sulkta, Bob's, etc) at $ALDABRA_DATA/daos/<name>.json. First-registered DAO becomes active automatically. Args: name (lowercase letters/digits/underscore/dash), governor_addr, stakes_addr, treasury_addr (all bech32), gov_token_policy (56 hex chars), gov_token_name_hex (hex of asset name), initial_spend (txhash#index, the Agora bootstrap tx ref), max_cosigners (u32), treasury_ref_config (56 hex chars). Optional: description, network (mainnet/preprod/preview, default mainnet)."
+        description = "Register a DAO config (Sulkta, Bob's, etc) at $ALDABRA_DATA/daos/<name>.json. First-registered DAO becomes active automatically. Required: name (lowercase letters/digits/underscore/dash), governor_addr, stakes_addr, treasury_addr (all bech32), gov_token_policy (56 hex chars), gov_token_name_hex (hex of asset name), initial_spend (txhash#index, the Agora bootstrap tx ref), max_cosigners (u32), treasury_ref_config (56 hex chars). Optional: description, network (mainnet/preprod/preview, default mainnet), and Phase-4 prerequisites — proposal_addr, stake_st_policy, proposal_st_policy (56 hex), plus reference UTxO refs (`txhash#index`) for governor_validator / stake_validator / proposal_validator / stake_st_policy / proposal_st_policy. The optional Phase-4 fields can be populated now or later via dao_discover_scripts (when shipped)."
     )]
     async fn dao_register(
         &self,
@@ -1326,6 +1326,14 @@ impl WalletService {
             max_cosigners,
             treasury_ref_config,
             network,
+            proposal_addr,
+            stake_st_policy,
+            proposal_st_policy,
+            governor_validator_ref,
+            stake_validator_ref,
+            proposal_validator_ref,
+            stake_st_policy_ref,
+            proposal_st_policy_ref,
         }: DaoRegisterArgs,
     ) -> Result<String, String> {
         let cfg = DaoConfig {
@@ -1344,12 +1352,17 @@ impl WalletService {
                 Some("preview") => DaoNetwork::Preview,
                 _ => DaoNetwork::Mainnet,
             },
-            // Optional discovery fields — populated by `dao_discover_scripts`
-            // after registration.
-            proposal_addr: None,
-            stake_st_policy: None,
-            proposal_st_policy: None,
-            script_refs: ScriptRefs::default(),
+            proposal_addr,
+            stake_st_policy,
+            proposal_st_policy,
+            script_refs: ScriptRefs {
+                governor_validator: governor_validator_ref,
+                stake_validator: stake_validator_ref,
+                proposal_validator: proposal_validator_ref,
+                treasury_validator: None,
+                stake_st_policy: stake_st_policy_ref,
+                proposal_st_policy: proposal_st_policy_ref,
+            },
         };
         self.inner
             .dao_store
@@ -1680,6 +1693,38 @@ pub struct DaoRegisterArgs {
     /// "mainnet" | "preprod" | "preview". Default mainnet.
     #[serde(default)]
     pub network: Option<String>,
+
+    // ─── Phase 4 prerequisites — all optional ─────────────────────────────
+    //
+    // Populate these to unlock dao_proposal_create_unsigned and the
+    // upcoming vote/cosign/advance tools. Each can be discovered via
+    // chain queries (the audit pattern at memory/audit-sulkta-agora-*.md);
+    // a future dao_discover_scripts MCP tool will fill them automatically.
+
+    /// Proposal validator address (bech32). Where new proposal UTxOs land.
+    #[serde(default)]
+    pub proposal_addr: Option<String>,
+    /// 56 hex chars — StakeST minting policy id.
+    #[serde(default)]
+    pub stake_st_policy: Option<String>,
+    /// 56 hex chars — ProposalST minting policy id.
+    #[serde(default)]
+    pub proposal_st_policy: Option<String>,
+    /// `txhash#index` reference UTxO carrying the governor validator script.
+    #[serde(default)]
+    pub governor_validator_ref: Option<String>,
+    /// `txhash#index` reference UTxO carrying the stake validator script.
+    #[serde(default)]
+    pub stake_validator_ref: Option<String>,
+    /// `txhash#index` reference UTxO carrying the proposal validator script.
+    #[serde(default)]
+    pub proposal_validator_ref: Option<String>,
+    /// `txhash#index` reference UTxO carrying the StakeST minting policy script.
+    #[serde(default)]
+    pub stake_st_policy_ref: Option<String>,
+    /// `txhash#index` reference UTxO carrying the ProposalST minting policy script.
+    #[serde(default)]
+    pub proposal_st_policy_ref: Option<String>,
 }
 
 #[derive(Debug, Deserialize, schemars::JsonSchema)]