MCP Tool Descriptions are not contained in the Agent instructions

[g3force]

We expect the tool descriptions to be passed to the agent so that they don't have to be explicitly described in the prompt.

However, the tool descriptions for the cross-selling showcase look like this:

Functions:
get_customer_crm_data: {'customer_id': {'title': 'Customer Id', 'type': <Type.STRING: 'STRING'>}} -> None
get_all_customer_data: {} -> None
send_message: {'customer_id': {'title': 'Customer Id', 'type': <Type.STRING: 'STRING'>}, 'subject': {'title': 'Subject', 'type': <Type.STRING: 'STRING'>}, 'body': {'title': 'Body', 'type': <Type.STRING: 'STRING'>}} -> None
get_insurance_products: {} -> None
get_product_details: {'product_id': {'title': 'Product Id', 'type': <Type.STRING: 'STRING'>}} -> None
get_products_by_segment: {'segment': {'title': 'Segment', 'type': <Type.STRING: 'STRING'>}} -> None

Unfortunately, this is an issue in the Google ADK… We are already creating an additional description for sub-agents. We will need to do the same for MCP tools or even better fix it upstream.

Some investigation was done here: #15