diff --git a/dnas/grant_pools/zomes/integrity/grants/src/agent_to_evm_wallet.rs b/dnas/grant_pools/zomes/integrity/grants/src/agent_to_evm_wallet.rs
index 5edd4da..6412ead 100644
--- a/dnas/grant_pools/zomes/integrity/grants/src/agent_to_evm_wallet.rs
+++ b/dnas/grant_pools/zomes/integrity/grants/src/agent_to_evm_wallet.rs
@@ -2,22 +2,26 @@ use alloy_primitives::Address;
 use hdi::prelude::*;
 
 pub fn validate_create_link_agent_to_evm_wallet(
-    _action: CreateLink,
+    action: CreateLink,
     base_address: AnyLinkableHash,
     target_address: AnyLinkableHash,
     _tag: LinkTag,
 ) -> ExternResult<ValidateCallbackResult> {
+    let author_pubkey = base_address
+        .into_agent_pub_key()
+        .ok_or(wasm_error!("Base address must be an AgentPubKey"))?;
+    if action.author != author_pubkey {
+        return Ok(ValidateCallbackResult::Invalid(
+            "Cannot add wallet for another agent besides yourself".to_string(),
+        ));
+    }
     let evm_address = String::from_utf8(target_address.into_inner()).map_err(|e| {
         wasm_error!(WasmErrorInner::Guest(format!(
             "Error converting target address to string: {:?}",
             e
         )))
     })?;
-    if !AgentPubKey::try_from(base_address).is_ok() {
-        return Ok(ValidateCallbackResult::Invalid(
-            "Can only link wallet from an AgentPubKey".to_string(),
-        ));
-    }
+
     if !Address::parse_checksummed(&evm_address, None).is_ok() {
         return Ok(ValidateCallbackResult::Invalid(
             "Can only link to valid evm address".to_string(),
diff --git a/dnas/grant_pools/zomes/integrity/grants/src/grant_pool.rs b/dnas/grant_pools/zomes/integrity/grants/src/grant_pool.rs
index f1e53ac..a257c8d 100644
--- a/dnas/grant_pools/zomes/integrity/grants/src/grant_pool.rs
+++ b/dnas/grant_pools/zomes/integrity/grants/src/grant_pool.rs
@@ -41,6 +41,17 @@ pub fn validate_create_grant_pool(
             "Evaluators cannot be empty".to_string(),
         ));
     }
+    if grant_pool.amount_range.min > grant_pool.amount_range.min {
+        return Ok(ValidateCallbackResult::Invalid(
+            "Amount range max must be greater than min".to_string(),
+        ));
+    }
+    if grant_pool.evaluators.len() == 0 {
+        return Ok(ValidateCallbackResult::Invalid(
+            "Must have at least one evaluator".to_string(),
+        ));
+    }
+
     let record = must_get_valid_record(grant_pool.time_period.clone())?;
     let _time_period: crate::TimePeriod = record
         .entry()
diff --git a/dnas/grant_pools/zomes/integrity/grants/src/grant_pool_to_applications.rs b/dnas/grant_pools/zomes/integrity/grants/src/grant_pool_to_applications.rs
index 5071531..e89bb54 100644
--- a/dnas/grant_pools/zomes/integrity/grants/src/grant_pool_to_applications.rs
+++ b/dnas/grant_pools/zomes/integrity/grants/src/grant_pool_to_applications.rs
@@ -5,12 +5,13 @@ pub fn validate_create_link_grant_pool_to_application(
     target_address: AnyLinkableHash,
     _tag: LinkTag,
 ) -> ExternResult<ValidateCallbackResult> {
-    let action_hash = base_address
-        .into_action_hash()
-        .ok_or(wasm_error!(WasmErrorInner::Guest(String::from(
-            "No action hash associated with link"
-        ))))?;
-    let record = must_get_valid_record(action_hash)?;
+    let base_action_hash =
+        base_address
+            .into_action_hash()
+            .ok_or(wasm_error!(WasmErrorInner::Guest(String::from(
+                "No action hash associated with link"
+            ))))?;
+    let record = must_get_valid_record(base_action_hash.clone())?;
     let _grant_pool: crate::GrantPool = record
         .entry()
         .to_app_option()
@@ -25,13 +26,18 @@ pub fn validate_create_link_grant_pool_to_application(
                 "No action hash associated with link"
             ))))?;
     let record = must_get_valid_record(action_hash)?;
-    let _application: crate::Application = record
+    let application: crate::Application = record
         .entry()
         .to_app_option()
         .map_err(|e| wasm_error!(e))?
         .ok_or(wasm_error!(WasmErrorInner::Guest(String::from(
             "Linked action must reference an entry"
         ))))?;
+    if application.grant_pool != base_action_hash {
+        return Ok(ValidateCallbackResult::Invalid(
+            "Base address must be the Grant Pool action hash".to_string(),
+        ));
+    }
     Ok(ValidateCallbackResult::Valid)
 }
 pub fn validate_delete_link_grant_pool_to_applications(
diff --git a/dnas/grant_pools/zomes/integrity/grants/src/sponsor_to_grant_pools.rs b/dnas/grant_pools/zomes/integrity/grants/src/sponsor_to_grant_pools.rs
index c7801f8..8593881 100644
--- a/dnas/grant_pools/zomes/integrity/grants/src/sponsor_to_grant_pools.rs
+++ b/dnas/grant_pools/zomes/integrity/grants/src/sponsor_to_grant_pools.rs
@@ -1,11 +1,19 @@
 use alloy_primitives::U256;
 use hdi::prelude::*;
 pub fn validate_create_link_sponsor_to_grant_pool(
-    _action: CreateLink,
-    _base_address: AnyLinkableHash,
+    action: CreateLink,
+    base_address: AnyLinkableHash,
     target_address: AnyLinkableHash,
     tag: LinkTag,
 ) -> ExternResult<ValidateCallbackResult> {
+    let author_pubkey = base_address
+        .into_agent_pub_key()
+        .ok_or(wasm_error!("Base address must be an AgentPubKey"))?;
+    if action.author != author_pubkey {
+        return Ok(ValidateCallbackResult::Invalid(
+            "Author not valid, can only add yourself as a sponsor".to_string(),
+        ));
+    }
     if U256::from_le_slice(&tag.into_inner()) == U256::from(0) {
         return Ok(ValidateCallbackResult::Invalid(
             "amount cannot be zero".to_string(),