timegate_get_device_info

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

With no annotations, the description carries the full behavioral burden. "Report" implies a read with no side effects and the clause "explicit hardware is a caller override, not a queried device identity" usefully clarifies that an override changes which identity is reported rather than what is discovered on the device. However, it never states read-only/non-destructive explicitly, nor behavior on unreachable hosts or which errors to expect.

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?

Front-loaded with the payoff (what gets reported), then the hardware-override caveat, then the device scope and guide pointer. Three dense sentences with no padding, though the semicolon-joined caveat takes a second read.

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 parameterless-info tool with a fully described schema and no output schema, the description is largely complete: it names the returned fields and the five 128×128 screen layout. It still omits the read-only guarantee and failure modes, which matters because no annotations exist to cover them.

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%, so the nested target/host/port/model/hardware fields are already well documented and the baseline is 3. The description adds one genuine nuance the schema lacks — that a supplied hardware value is a caller override rather than a queried identity — but says nothing about host, port, model, or timeout semantics.

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?

Specific verb+resource: "Report the selected hardware profile, endpoint and per-screen canvas" tells the agent exactly what comes back, and "TimeGate Hardware 400/402 only" scopes it to a device family. It never names watchface_get_device_info or pixoo64_get_device_info, so the agent must infer the sibling split from the tool name alone.

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?

Usage is implied rather than stated: the agent can infer 'call this to learn the device profile and screen layout before sending content,' and the TimeGate-only scope excludes other families. There is no explicit when-to-use/when-not phrasing or pointer to the sibling info tools, and "Read divoom://timegate/guide" is a reference rather than a routing rule.

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