diff --git a/src/mcp/ToolSchemas.json b/src/mcp/ToolSchemas.json
index 3520c10..ed3d8cb 100644
--- a/src/mcp/ToolSchemas.json
+++ b/src/mcp/ToolSchemas.json
@@ -5,10 +5,6 @@
   "description": "Defines the tools exported by the Kompanion memory daemon.",
   "type": "object",
   "properties": {
-    "namespace": {
-      "type": "string",
-      "description": "Default namespace applied to relative tool names."
-    },
     "tools": {
       "type": "object",
       "additionalProperties": {
@@ -34,7 +30,6 @@
     }
   },
   "required": [
-    "namespace",
     "tools"
   ],
   "additionalProperties": false,
@@ -52,7 +47,6 @@
   },
   "examples": [
     {
-      "namespace": "kom.memory.v1",
       "tools": {
         "save_context": {
           "description": "Persist context payload in the namespace-backed memory store.",
@@ -110,10 +104,19 @@
               "tags": {
                 "$ref": "#/$defs/stringList"
               },
+              "newest_first": {
+                "type": "boolean"
+              },
               "limit": {
                 "type": "integer"
               },
-              "since": {
+              "offset": {
+                "type": "integer"
+              },
+              "min_timestamp": {
+                "type": "string"
+              },
+              "max_timestamp": {
                 "type": "string"
               }
             },
@@ -164,6 +167,9 @@
           "input": {
             "type": "object",
             "properties": {
+              "namespace": {
+                "type": "string"
+              },
               "model": {
                 "type": "string"
               },
@@ -172,6 +178,7 @@
               }
             },
             "required": [
+              "namespace",
               "texts"
             ],
             "additionalProperties": false
@@ -429,6 +436,7 @@
                 "type": "boolean"
               }
             },
+            "required": [],
             "additionalProperties": false
           },
           "output": {
diff --git a/tests/contract/test_mcp_tools.cpp b/tests/contract/test_mcp_tools.cpp
index 3af9bcd..0f3d1e2 100644
--- a/tests/contract/test_mcp_tools.cpp
+++ b/tests/contract/test_mcp_tools.cpp
@@ -30,6 +30,10 @@ std::string saveResp = server.dispatch("kom.memory.v1.save_context", saveReq);
 if (!expect_contains(saveResp, "\"id\"", "save_context id")) return 1;
 if (!expect_contains(saveResp, "\"created_at\"", "save_context timestamp")) return 1;
 
+    const std::string saveReqNoNamespace = R"({"key":"nogreeting","content":{"text":"remember this without namespace"},"tags":["context","demo"]})";
+    std::string saveRespNoNamespace = server.dispatch("kom.memory.v1.save_context", saveReqNoNamespace);
+    if (!expect_contains(saveRespNoNamespace, "\"error\":{\"code\":\"bad_request\",\"message\":\"namespace is required\"}", "save_context without namespace should fail")) return 1;
+
 const std::string recallReq = R"({"namespace":"tests","key":"greeting","limit":2})";
 std::string recallResp = server.dispatch("kom.memory.v1.recall_context", recallReq);
 if (!expect_contains(recallResp, "\"items\"", "recall_context items")) return 1;