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Server has 6 tools with complete input schemas and descriptions. Naming follows verb_noun convention (list_ports, connect_rs485, read_rs485, write_rs485, disconnect_rs485, get_connection_status). Descriptions are present but brief (10-60 chars), below the 50-200 char LLM-optimized baseline. Parameters are typed and described. However, error handling lacks recovery guidance, and output schemas are not formally documented. No tool annotations (readOnlyHint/destructiveHint) despite clear risk levels. Resource endpoint present but minimal.
Establish a connection to an RS485 device
Close an RS485 connection
Get the status of an RS485 connection
List available serial ports
Read data from an RS485 connection
Write data to an RS485 connection
Descriptions are too brief (10-60 chars vs. 50-200 char baseline). LLMs cannot determine when to select tools or understand prerequisites. E.g., 'List available serial ports' lacks context on when to call it.
No tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite clear risk levels. connect_rs485 and write_rs485 are destructive; list_ports and read_rs485 are read-only. Agents cannot infer safety without annotations.
Error messages lack recovery guidance. E.g., 'Connection not found' does not suggest calling list_ports or get_connection_status. Agents cannot self-correct without actionable error context.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | D | 57 | 2026-07-28+ | v2 |
Output schemas not formally documented. read_rs485 returns hex string; write_rs485 returns int; get_connection_status returns dict. LLMs must infer structure from code, risking parsing errors.
Parameter descriptions lack format/constraint details. E.g., 'Hex-encoded data' does not specify case sensitivity, whitespace handling, or max length. Validation happens at runtime; LLMs cannot plan ahead.