Critical failures across all dimensions. The single tool 'execute_skill_action' has a description (positive), but the schema is severely incomplete: state_proposal and node_signatures lack type definitions at the top level (object vs array not declared in the visible schema structure). The mcp_server.py file shows only a stub that prints JSON, no actual tool registration, parameter validation, or MCP protocol implementation. Tool definitions appear inferred rather than explicitly registered. No error handling, no output schema documentation, no parameter descriptions beyond bare names. The implementation does not follow MCP patterns for tool definition or composition.

• Implement full MCP tool registration in mcp_server.py with explicit schema, descriptions, and parameter types. Use the MCP SDK or follow the protocol spec for tool definition.
• Add complete input schema: declare state_proposal as {type: 'object', properties: {action: {type: 'string', description: '...'}, hash: {type: 'string', description: '...'}}} and node_signatures as {type: 'array', items: {type: 'string'}, description: '...'}.
• Document output schema with all response fields (proposal_hash, consensus_status, total_participating_nodes, valid_signatures_verified, byzantine_faulty_nodes_isolated, finality_latency_ms) and their types.
• Add error handling: describe what happens if quorum is not reached, if signatures are invalid, or if the operation times out. Include recovery guidance (e.g., 'Retry with additional node signatures' or 'Check node connectivity').
• Rename tool to 'propose_consensus_state' or 'commit_ledger_block' to clarify the action. Add parameter descriptions explaining that node_signatures must be valid cryptographic signatures and state_proposal.hash must match the action.