adb_wear_datalayer_preflight

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

With no annotations, the description carries the full disclosure burden and does deliver two useful traits: the operation is read-only, and it deliberately withholds pairing identifiers (a privacy-relevant behavior). It still omits what happens on failure, whether it blocks or times out on a missing device, and what a partial/missing Play services result looks like, which matters for a multi-device diagnostic.

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

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

Two sentences, front-loaded with the action and resource, then a tight enumeration of checks. The list is long but every item conveys distinct diagnostic coverage, and the closing privacy clause is load-bearing rather than filler.

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

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

For a zero-required-parameter, fully-documented-schema tool this covers the input side well, but there is no output schema and the description never indicates what the preflight report contains or how issues are surfaced — the one thing an agent would most want to know before calling a diagnostic.

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

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

Schema coverage is 100% and each parameter already documents itself, including auto-detection when omitted. The description only lightly reinforces this by calling out 'device roles' and 'optional app packages', adding the useful framing that packages are the expected/anticipated apps rather than filters, but nothing beyond that.

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

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

The description names a specific verb ('Run a ... preflight') and a specific resource ('Wear OS Data Layer'), then enumerates exactly what is inspected (device roles, Play services, Bluetooth, packages, companion association, Data Layer signals). No sibling tool covers the Wear OS Data Layer, so it is distinguishable in practice, though it never explicitly contrasts itself with near-neighbors like adb_health_check or adb_pair.

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

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

The word 'preflight' implies a before-you-build/before-you-debug context, but the description never states when to run this versus adb_devices, adb_health_check, or adb_pair, nor any prerequisites or when-not conditions. Usage is inferable from the framing rather than stated.

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