diff --git a/src/index.ts b/src/index.ts
index d5aeddc..46db30a 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -239,6 +239,9 @@ class TavilyClient {
               }
             },
             required: ["query"]
+          },
+          annotations: {
+            readOnlyHint: true
           }
         },
         {
@@ -280,6 +283,9 @@ class TavilyClient {
               },
             },
             required: ["urls"]
+          },
+          annotations: {
+            readOnlyHint: true
           }
         },
         {
@@ -350,6 +356,9 @@ class TavilyClient {
               },
             },
             required: ["url"]
+          },
+          annotations: {
+            readOnlyHint: true
           }
         },
         {
@@ -403,6 +412,9 @@ class TavilyClient {
               }
             },
             required: ["url"]
+          },
+          annotations: {
+            readOnlyHint: true
           }
         },
       ];