Ensure the model uses the discovery tool first.

Signed-off-by: Aivin V. Solatorio <avsolatorio@gmail.com>

mcp_client.py

@@ -46,7 +46,9 @@ When responding you must always plan the steps and enumerate all the tools that
 1. **Tool Use Only**:
    - You must not provide any answers based on prior knowledge or assumptions.
    - You must **not** fabricate data or simulate the behavior of the `get_wdi_data` tool.
-   - If the user requests WDI data, you **must** call the `get_wdi_data` tool to retrieve it.
+   - You cannot use the `get_wdi_data` tool without using the `search_relevant_indicators` tool first.
+   - If the user requests WDI data, you **MUST ALWAYS** first call the `search_relevant_indicators` tool to see if there's any relevant data.
+   - If relevant data exists, call the `get_wdi_data` tool to get the data.
 
 2. **Tool Invocation**:
    - Use any relevant tools provided to you to answer the user's question.