Loading ToolBench
A Model Context Protocol server implementation in Go with HTTP transport, JWT authentication, and tool registration framework
Single tool with reasonable naming and schema presence, but descriptions lack depth and parameter documentation is minimal. Tool 'echo_message' follows verb_noun convention and has a basic schema with type definitions, but descriptions are generic and lack context for when/why an LLM should use this tool. No output schema is documented. Error handling guidance is absent. The server is a boilerplate reference implementation, which explains the simplicity, but does not meet production quality standards.
Returns the provided message
Tool description is too generic and lacks context. 'Returns the provided message' (31 chars) does not explain WHEN to call this tool, what problem it solves, or what makes it distinct from other tools. LLMs cannot determine appropriate selection criteria.
Missing output schema documentation. The tool returns a string or structured object, but there is no documented schema defining what the response contains, how pagination works (if applicable), or what fields downstream tools can reference.
Parameter descriptions are minimal (13-44 chars). 'Message to echo back' and 'Whether to uppercase the message' lack detail about constraints, acceptable values, defaults, or error conditions. Descriptions should explain format, range, and usage context.
Inferred effective spec: 2025-06-18+.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-22 | D | 56 | 2025-06-18+ | v2 |
| 2026-03-09 | D | 59 | - | v1 |
No error handling guidance. The tool definition includes no documentation of failure modes, how to recover from errors, or what invalid inputs trigger. Error responses will lack actionable guidance for LLM recovery.
No tool annotations present. The tool should declare readOnlyHint, destructiveHint, or idempotentHint to signal to agents whether repeated calls are safe and whether state changes occur.