Universal MCP ↔ A2A Bridge — connect any MCP client to any A2A agent
Nexarion exposes 7 tools that bridge MCP and A2A protocols. Critical gaps: (1) Most tools lack input schemas entirely, tools/list, resources/list, prompts/list have no visible schema definitions. (2) Descriptions are minimal (10-50 chars) and lack actionable context for LLM selection. (3) No output schemas documented. (4) tools/call accepts generic 'arguments' object with no structure. (5) No error handling guidance, recovery hints, or validation rules. (6) Tool names use slash notation (tools/list) rather than verb_noun convention, making intent ambiguous. (7) No parameter descriptions beyond bare names. This server prioritizes protocol bridging over agent usability.
Initialize the MCP server and return protocol version and capabilities
Get the messages for a specific prompt template
List all available prompt templates from bridged A2A agents
List all available resources from bridged A2A agents
Read the contents of a specific resource by URI
Call an MCP tool by name with provided arguments
List all available MCP tools exposed from bridged A2A agents
Missing input schemas for 4 of 7 tools (initialize, tools/list, resources/list, prompts/list). No visible JSON Schema definitions in source code.
Tool names use slash notation (tools/list, resources/read) instead of verb_noun convention (list_tools, read_resource). LLMs struggle to parse intent from non-standard naming.
Descriptions are 10-50 characters, below the 10-1024 baseline. No context for when/why to call each tool. E.g., 'List all available MCP tools' lacks guidance on prerequisites or expected output structure.
Inferred effective spec: 2026-07-28+.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | F | 25 | 2026-07-28+ | v2 |
tools/call accepts generic 'arguments' object with no schema constraints. LLMs cannot validate argument structure before calling. No enum, type, or format constraints visible.
No output schemas documented for any tool. LLMs cannot plan downstream calls or extract required fields (e.g., tool_id, resource_uri). Breaks tool chaining.