diff --git a/app/routers/tools.py b/app/routers/tools.py
new file mode 100644
index 0000000..dff8468
--- /dev/null
+++ b/app/routers/tools.py
@@ -0,0 +1,40 @@
+"""
+app/routers/tools.py — Tool-Definitionen für Ollama/n8n/MCP (read-only)
+Version: 0.1.0 • Stand: 2025-10-07
+"""
+
+from __future__ import annotations
+from fastapi import APIRouter
+
+router = APIRouter()
+
+TOOLS = {
+  "tools": [
+    {"type":"function","function":{
+      "name":"mindnet_query",
+      "description":"Hybrid-Retrieval (semantik + edges).",
+      "parameters":{"type":"object","properties":{
+        "top_k":{"type":"integer","default":10,"minimum":1,"maximum":50},
+        "expand_depth":{"type":"integer","default":1,"minimum":0,"maximum":3},
+        "edge_types":{"type":"array","items":{"type":"string"},
+                      "default":["references","belongs_to","prev","next"]},
+        "query_vector":{"type":"array","items":{"type":"number"},
+                        "description":"384-dim Query-Vektor"},
+        "filters":{"type":"object"}
+      },"required":["query_vector"]}}},
+
+    {"type":"function","function":{
+      "name":"mindnet_subgraph",
+      "description":"Nachbarschaft (Edges) einer Note/ID.",
+      "parameters":{"type":"object","properties":{
+        "note_id":{"type":"string"},
+        "depth":{"type":"integer","default":1,"minimum":0,"maximum":3},
+        "edge_types":{"type":"array","items":{"type":"string"},
+                      "default":["references","belongs_to","prev","next","backlink"]}
+      },"required":["note_id"]}}}
+  ]
+}
+
+@router.get("/ollama")
+def get_ollama_tools():
+    return TOOLS