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

Beyond the read-only/idempotent annotations, the description discloses the status taxonomy, what counts are returned, the per-firmware and per-OSC-address structure, and the special meaning of needs_firmware=true when reports disagree. That is substantive behavioral context the annotations do not carry.

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 dense but front-loaded with the core definition and then moves to caveats and usage. It earns most of its length through the status list and the needs_firmware explanation, though the first sentence is quite packed and could be easier to parse.

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 an output schema already defining return values and annotations covering safety and idempotency, the description supplies the remaining operational context: what trust means, the status categories, firmware-level variance, and the needs_firmware edge case. Nothing essential for correct invocation appears missing.

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 device and user_id parameters are already documented in the schema. The description adds related operational context around identifying the device before reporting, but it does not add parameter-specific syntax or selection guidance beyond the schema, so baseline 3 is appropriate.

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 states a specific resource and scope: a driver's confirmation/trust status per firmware, including report counts, per-firmware statuses, device identities, and per-OSC-address breakdowns. That is far more precise than a restatement of the name and lets an agent distinguish this from reporting or contribution siblings.

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?

It gives clear usage context: check trust before relying on a driver, together with source_tier. It also explains the needs_firmware caveat and points to 'learn' for device identification. It does not explicitly name when not to use it or name an alternative sibling, so it stops short of a 5.

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