fix: instruct agent to use nsip MCP tools directly, not bash

Agent was trying to run nsip binary via bash instead of calling
the registered MCP tools (nsip-details, nsip-trait_ranges, etc).
Added explicit instructions to use MCP tools by name.

Author: zircote

.github/workflows/flock-action.md

@@ -83,7 +83,11 @@ LPN IDs list.
 
 ## Action Dispatch
 
-Call the appropriate **nsip** MCP tools based on the action type:
+You have access to the **nsip** MCP server tools. Call them directly by name
+(e.g., `nsip-details`, `nsip-trait_ranges`, `nsip-compare`). Do NOT try to run
+the nsip binary via bash — use the MCP tools instead.
+
+Call the appropriate nsip tools based on the action type:
 
 ### Mating Recommendations
 For each ewe LPN: