diff --git a/src/aegis_gitea_mcp/mcp_protocol.py b/src/aegis_gitea_mcp/mcp_protocol.py
index d340a9c..010cf91 100644
--- a/src/aegis_gitea_mcp/mcp_protocol.py
+++ b/src/aegis_gitea_mcp/mcp_protocol.py
@@ -10,7 +10,13 @@ class MCPTool(BaseModel):
 
     name: str = Field(..., description="Unique tool identifier")
     description: str = Field(..., description="Human-readable tool description")
-    input_schema: Dict[str, Any] = Field(..., description="JSON Schema for tool input")
+    input_schema: Dict[str, Any] = Field(
+        ..., alias="inputSchema", description="JSON Schema for tool input"
+    )
+
+    class Config:
+        populate_by_name = True
+        by_alias = True
 
 
 class MCPToolCallRequest(BaseModel):
diff --git a/src/aegis_gitea_mcp/server.py b/src/aegis_gitea_mcp/server.py
index 1cab8e5..27bb160 100644
--- a/src/aegis_gitea_mcp/server.py
+++ b/src/aegis_gitea_mcp/server.py
@@ -167,7 +167,7 @@ async def list_tools() -> JSONResponse:
         JSON response with list of tool definitions
     """
     response = MCPListToolsResponse(tools=AVAILABLE_TOOLS)
-    return JSONResponse(content=response.model_dump())
+    return JSONResponse(content=response.model_dump(by_alias=True))
 
 
 @app.post("/mcp/tool/call")
@@ -336,7 +336,11 @@ async def sse_message_handler(request: Request) -> JSONResponse:
             # Return the list of available tools
             response = MCPListToolsResponse(tools=AVAILABLE_TOOLS)
             return JSONResponse(
-                content={"jsonrpc": "2.0", "id": message_id, "result": response.model_dump()}
+                content={
+                    "jsonrpc": "2.0",
+                    "id": message_id,
+                    "result": response.model_dump(by_alias=True),
+                }
             )
 
         elif message_type == "tools/call":