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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so safety is covered. The description's one real addition is 'Excludes private notes', a useful scope disclosure, but it says nothing about lookup failure behavior, auth requirements, or response shape beyond the three named fields.

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?

Two short sentences with no padding, and the primary action is front-loaded. The brevity is efficient, though it borders on under-specification rather than pure economy.

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?

For a one-parameter read tool with rich annotations and no output schema, the description covers purpose and the notable exclusion. It still omits the identifier type the agent must supply and any indication of what happens for a missing or unauthorized product, which matters given 0% schema coverage.

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 0% and the sole 'product' parameter has no descriptive text in the schema. The description could have said it expects a product UUID (the schema's pattern) but instead says nothing about the argument, leaving the agent to infer format from the raw regex.

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 verb and cardinality ('Read one product') plus the fields returned (stock, SKU, price), which implicitly separates it from fitssey_list_products. It never names a sibling explicitly, so differentiation is inferred rather than stated.

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 word 'one' implies this is the single-record counterpart to fitssey_list_products, but the description gives no explicit when-to-use rule, no prerequisite for obtaining a product identifier, and no statement about behavior when the product does not exist.

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