Describe Protocol Support

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and a closed world, so the safety profile is covered. The description does add meaningful domain substance the annotations cannot convey — that the I2C/SPI scaffolds are behavioral teaching circuits rather than real protocol implementations. It stops short of saying what the response looks like (prose? structured flags?), so this is a moderate add.

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?

A single short sentence with no filler, and the substantive point (I2C/SPI scaffolds are teaching circuits) is front-loaded. It loses a point only because the imperative 'State that...' framing is an instruction rather than a tool description, which is a slightly confusing structure for a definition field.

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?

With no parameters and no output schema, the description is not required to enumerate returns, and it does communicate the core payload (protocol scaffolds are educational, not functional). It remains thin for a description tool though — it never says what the tool returns or how it interacts with the scaffold_* siblings, so an agent is left guessing at the response shape.

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 takes zero parameters and the schema is empty, so there is nothing for the description to disambiguate. Baseline 4 applies; no param-level gaps exist to compensate for.

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 name and title identify a 'describe' tool about protocol support, and the description narrows the subject to I2C/SPI scaffolds being behavioral teaching circuits. But the imperative phrasing 'State that...' describes an instruction to the agent's output rather than what the tool itself does/returns, leaving the verb-resource relationship ambiguous. It also doesn't distinguish itself from neighbors like describe_mixed_signal_support or scaffold_i2c_device/scaffold_spi_device.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives. Given many sibling 'describe_*' and 'scaffold_*' tools, the agent gets no signal about when this specific explanation is the right call versus scaffold_i2c_device/scaffold_spi_device or describe_mixed_signal_support.

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