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COLMI Smart Ring MCP Server

COLMI Smart Ring MCP Server

by orviwan
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

get_ring_status

Read a smart ring's hardware, firmware, battery, and charging status over Bluetooth. Omit the address to auto-detect and connect to the nearest ring.

Instructions

Connects to the smart ring and queries hardware revision, firmware revision, battery percentage, and current charging status. If address is omitted, automatically finds and connects to the nearest ring.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "get_ring_status"
  }
}

Input Schema

NameRequiredDescriptionDefault
addressNo

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.7/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full behavioral burden. It discloses the auto-discovery/auto-connect behavior when address is omitted, which is genuinely useful, but says nothing about pairing prerequisites, connection side effects, or failure modes if no ring is found.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two tight sentences with no filler; the queried fields are front-loaded and the address fallback is stated second. Every clause earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need not be documented, and the description still usefully enumerates what is queried. For a no-annotation tool the remaining gap is behavioral – no mention of connection side effects or error handling – which keeps it from being fully complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0%, so the description must compensate for the single address parameter – and it does, explaining that omitting it triggers nearest-ring discovery and connection. This adds real meaning beyond the bare 'Address' schema field, though the expected address format is not specified.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States specific verbs (connects, queries) and a precise resource (the smart ring) plus the exact data returned: hardware revision, firmware revision, battery percentage, and charging status. It is distinguishable from siblings like get_sleep_and_recovery or get_daily_activity by the status/telemetry framing, though it never names a sibling explicitly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit when-to-use or when-not guidance and no named alternatives (e.g., scan_rings to discover an address). The one usage note given – that omitting address auto-discovers the nearest ring – is helpful but partial, leaving the agent to infer when this status query is appropriate.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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