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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description usefully adds that fitting parts are 'verified first' and that manufacturer's notes are included, which tells the agent something about result reliability. It does not disclose auth requirements, rate limits, or the non-idempotent behavior flagged in annotations.

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 well-structured sentence with a colon-led enumeration that is front-loaded on the core purpose. It is dense but each clause (memory, storage, power, CPU/cooling, GPU clearance) carries distinct information rather than filler.

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 present, the description need not explain return values, and it adequately conveys the content domains and the verification caveat. The main gap is the absence of routing guidance relative to sibling repair/compatibility tools.

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 description coverage is 100%, so the schema already documents id, goal and model. The description implies a target device ('this device') but adds no syntax, format, or constraint detail about the parameters beyond what the schema provides. 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 concrete resource and scope: upgrade options for a given device, enumerated across memory, storage, power, CPU/cooling and GPU clearance. An agent can tell it produces a candidate upgrade plan rather than a yes/no check. It does not, however, explicitly differentiate itself from siblings like check_compatibility, check_fit or find_parts.

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 explicit when-to-use or when-not-to-use guidance, and none of the closely related siblings (check_compatibility, check_fit, find_parts, validate_purchase_plan) are named as alternatives. Usage must be inferred from the enumerated content.

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