Same @tool decorator wiring bug as #702 (PostgreSQL + MySQL, fixed in #703 and #704), now for Azure SQL. All 5 Azure SQL diagnostic tools silently fail with TypeError: missing 2 required positional arguments: 'server' and 'database' on every agent invocation, because the @tool(...) decorator is missing the is_available and extract_params callbacks.

The broken tools (5 total)

• get_azure_sql_current_queries
• get_azure_sql_resource_stats
• get_azure_sql_server_status
• get_azure_sql_slow_queries
• get_azure_sql_wait_stats

Root cause

Identical to #702. The @tool(...) decorator on each tool omits is_available and extract_params, so the execution layer in app/nodes/investigate/execution/execute_actions.py:49-50 calls action.run(**{}) — and each tool raises TypeError because server and database are required positional parameters.

The MariaDB tool family at app/integrations/mariadb.py:160-176 has this wired up correctly; the PostgreSQL and MySQL helpers added in #703 and #704 mirrored that pattern. Azure SQL is the third and last of the database tool families sharing the same omission.

Evidence

During the end-to-end audit (make test-rds-synthetic on Gemini 2.5-flash, after #703 and #704 landed), the agent opportunistically invoked Azure SQL tools on RDS PostgreSQL scenarios, producing 92 Azure SQL TypeError failures across the 15 scenarios:

After applying the same wiring pattern used in #703 and #704, those drop to 0. The tools correctly report unavailable when no Azure SQL integration is configured, and the agent stops attempting them on unrelated scenarios.

Proposed fix

Mirror the PostgreSQL/MySQL pattern:

1. Add azure_sql_is_available(sources) and azure_sql_extract_params(sources) to app/integrations/azure_sql.py.
2. Wire both into all 5 @tool(...) decorators.

Azure SQL integration resolves credentials internally via resolve_azure_sql_config (same design as PG/MySQL), so extract_params only surfaces the three identifying params: server, database, port. Credentials (username, password, driver, encrypt) stay out of tool signatures and are never seen by the LLM.

I'll submit the PR.