get_device_info

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

The description declares the tool is 'Read-only', which is a key behavioral trait. It also notes that certain fields are conditional ('when the device supports...'), providing transparency beyond the empty schema. No annotations are present, so the description fully handles transparency.

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?

The description is two sentences, front-loaded with the main action, and every sentence adds value. No fluff.

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?

Given no output schema, the description thoroughly explains what is returned (vendor, product code, revision, host, port, unit id). It is sufficient for an AI to understand the tool's output.

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?

The tool has zero parameters, so schema_description_coverage is 100%. Per guidelines, baseline is 4. No additional parameter information is needed.

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 clearly states the tool retrieves identity and connection details for a Modbus device. It uses a specific verb 'Get' and specifies the resource (device info). The sibling tools read coils/registers, which are distinct, so this tool is well differentiated.

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 description does not explicitly state when to use this tool versus alternatives. It implies usage for device identity and connection details, but no when-not or alternative references are provided. However, the context is clear enough from the sibling tools.

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