diff --git a/clinicaltrials.js b/clinicaltrials.js
index 0c8a00b..354f00b 100644
--- a/clinicaltrials.js
+++ b/clinicaltrials.js
@@ -30,7 +30,7 @@ export const api = {
 export const tools = {
   studies: {
     name: "studies",
-    description: "Search clinical trials with filters. Use AND, OR, NOT, and parentheses for grouping.",
+    description: "Search clinical trials with filters.",
     parameters: {
       type: "object",
       required: ["fields"],
@@ -38,7 +38,7 @@ export const tools = {
         "query.cond": { type: "string", description: "Search for condition or disease" },
         "query.term": {
           type: "string",
-          description: "Search other terms like age, phase, design, sponsor, keyword, etc.",
+          description: 'Search age, phase, design, sponsor, keyword, etc.',
         },
         "query.locn": { type: "string", description: "Search for location (country, state, city, facility)" },
         "query.titles": { type: "string", description: "Search in title" },
diff --git a/script.js b/script.js
index b9c5c15..3e9cf49 100644
--- a/script.js
+++ b/script.js
@@ -34,7 +34,15 @@ $queryForm.addEventListener("submit", async (e) => {
       model: "gpt-4o-mini",
       stream: true,
       messages: [
-        { role: "system", content: "Find studies that will have the most relevant answers to the user question" },
+        {
+          role: "system",
+          content: `
+Find studies that will have the most relevant answers to the user question.
+In query.*, don't use phrases as-is. Always identify the most relevant keywords, combining them with AND.
+E.g. "violation by the FDA" becomes "violation AND FDA".
+E.g. "improper adherence to safety and scientific integrity" becomes "adherence AND safety AND integrity"
+`.trim(),
+        },
         { role: "user", content: query },
       ],
       tools: [{ type: "function", function: tools.studies }],