Strip submit_doc_bug tool and gate (Zerto-specific, not applicable to label MCP)

README.md

@@ -7,8 +7,7 @@ product-specific has been factored out.
 The end product is a streamable-HTTP MCP server with ~15 tools that
 any LLM client (Claude Desktop, Claude Code, Cursor, Copilot) can
 call to answer questions against the docs, surface what changed
-recently, find inconsistencies, and (optionally) submit doc bugs
-back upstream.
+recently, and flag likely inconsistencies.
 
 ## What's here
 
@@ -97,7 +96,7 @@ python -m docs_mcp.server --transport stdio
 - Registry GC script
 - Standard tools: `search_docs`, `get_page`, `list_versions`,
   `diff_versions`, `bundle_changelog`, `weekly_digest`,
-  `find_doc_inconsistencies`, `submit_doc_bug`, etc.
+  `find_doc_inconsistencies`, etc.
 
 ## License