diff --git a/crates/erp-ai/src/agent/tools/query_appointments.rs b/crates/erp-ai/src/agent/tools/query_appointments.rs
index 7b2c845..8b6980d 100644
--- a/crates/erp-ai/src/agent/tools/query_appointments.rs
+++ b/crates/erp-ai/src/agent/tools/query_appointments.rs
@@ -66,3 +66,14 @@ impl AgentTool for QueryAppointmentsTool {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn tool_name() {
+        let tool = QueryAppointmentsTool;
+        assert_eq!(tool.name(), "query_patient_appointments");
+    }
+}
diff --git a/crates/erp-ai/src/agent/tools/query_lab_reports.rs b/crates/erp-ai/src/agent/tools/query_lab_reports.rs
index e50d070..790cae1 100644
--- a/crates/erp-ai/src/agent/tools/query_lab_reports.rs
+++ b/crates/erp-ai/src/agent/tools/query_lab_reports.rs
@@ -83,3 +83,14 @@ impl AgentTool for QueryLabReportsTool {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn tool_name() {
+        let tool = QueryLabReportsTool;
+        assert_eq!(tool.name(), "query_patient_lab_reports");
+    }
+}
diff --git a/crates/erp-ai/src/agent/tools/query_medications.rs b/crates/erp-ai/src/agent/tools/query_medications.rs
index 9c50656..a5403ad 100644
--- a/crates/erp-ai/src/agent/tools/query_medications.rs
+++ b/crates/erp-ai/src/agent/tools/query_medications.rs
@@ -63,3 +63,14 @@ impl AgentTool for QueryMedicationsTool {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn tool_name() {
+        let tool = QueryMedicationsTool;
+        assert_eq!(tool.name(), "query_patient_medications");
+    }
+}
diff --git a/crates/erp-ai/src/agent/tools/query_vitals.rs b/crates/erp-ai/src/agent/tools/query_vitals.rs
index 4689267..5f43baf 100644
--- a/crates/erp-ai/src/agent/tools/query_vitals.rs
+++ b/crates/erp-ai/src/agent/tools/query_vitals.rs
@@ -94,3 +94,21 @@ impl AgentTool for QueryPatientVitalsTool {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn tool_name() {
+        let tool = QueryPatientVitalsTool;
+        assert_eq!(tool.name(), "query_patient_vitals");
+    }
+
+    #[test]
+    fn schema_has_days_param() {
+        let tool = QueryPatientVitalsTool;
+        let schema = tool.parameters_schema();
+        assert!(schema["properties"]["days"].is_object());
+    }
+}
diff --git a/crates/erp-ai/src/agent/tools/search_medical_knowledge.rs b/crates/erp-ai/src/agent/tools/search_medical_knowledge.rs
index 5abaaaf..088c187 100644
--- a/crates/erp-ai/src/agent/tools/search_medical_knowledge.rs
+++ b/crates/erp-ai/src/agent/tools/search_medical_knowledge.rs
@@ -110,3 +110,26 @@ impl AgentTool for SearchMedicalKnowledgeTool {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn tool_name() {
+        let tool = SearchMedicalKnowledgeTool;
+        assert_eq!(tool.name(), "search_medical_knowledge");
+    }
+
+    #[test]
+    fn schema_requires_query() {
+        let tool = SearchMedicalKnowledgeTool;
+        let schema = tool.parameters_schema();
+        assert!(
+            schema["required"]
+                .as_array()
+                .unwrap()
+                .contains(&serde_json::json!("query"))
+        );
+    }
+}