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

Annotations already indicate readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds no behavioral context beyond that, such as response scope, pagination, or any special constraints. With an output schema present, some return details are covered, but the description itself contributes little.

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 a single short sentence with no redundant words, and it front-loads the core action. It could be slightly more informative by naming a sibling or specifying the return type, but for a simple get-by-id tool this is appropriately concise.

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?

This is a low-complexity tool with one parameter, full schema coverage, an output schema, and annotations covering safety. The description provides enough context to understand the tool's core purpose, and the missing usage guidance is partially mitigated by the clear 'specific product' wording. A more explicit sibling distinction would improve completeness, but nothing critical is 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 description coverage is 100%, and the only parameter, product_id, is already documented with its format ('product_123'). The description does not add any additional semantic meaning, but the schema fully compensates, so the baseline of 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 uses a clear verb ('Get') and resource ('product'), and narrows the scope to a 'specific product,' which distinguishes it from broader search/list siblings like search_inventory. However, it does not explicitly name a sibling or clarify what 'detailed information' includes, leaving some ambiguity about which tools it contrasts with.

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 phrase 'specific product' implies this is the right tool when a single product_id is known, rather than for bulk operations or inventory search. There is no explicit guidance about when not to use it or which sibling might be a better alternative, so the usage guidance is only implied.

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