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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the description doesn't need to repeat the safety profile. It instead discloses real behavioral value: what the record contains, that the default assumes no board config, and that old names are followed through sourced renames. It stops short of saying what happens for unknown names or which release is used when omitted.

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 dense sentence that front-loads the resource ('One CLI setting of a firmware release') and enumerates only the fields an agent would care about. No filler; slightly compressed but readable.

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 output schema, the description carries the return-shape burden and does it well by enumerating the fields returned, including history and rename tracking. It is nearly complete for a read-only lookup; only error/not-found behavior is unaddressed.

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% – all three parameters, including the enum and the version format example, are documented in the schema. The description adds no syntax or format detail for name/version/firmware beyond the 'renames' note touching on name resolution, so the baseline 3 applies.

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?

States a specific resource precisely: 'One CLI setting of a firmware release' with the exact fields returned (type, range/values, default, source line, history). An agent can tell it's a per-setting detail lookup, though it never names or contrasts with siblings like fw_check_cli or fw_diff.

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 only implied by what the tool returns – the agent infers it should call this when it needs details on one named setting. There is no explicit when-to-use, no prerequisite, and no routing to the alternatives (fw_check_cli for pastes, fw_diff for comparisons).

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