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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds real value beyond that by enumerating exactly what data comes back and that it reflects a live refresh, though it omits pagination or result-count limits.

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 sentences, front-loaded with the tool's output content and followed by usage triggers; the dense field list is justified because no output schema exists. Slightly packed but nothing is wasted.

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 takes on the burden of describing return contents and does so thoroughly, and annotations cover safety. Missing only minor operational details such as result limits or ordering of the returned products.

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 both parameters are fully documented in the schema. The description's phrase 'most recent buy-box points' loosely maps to the points parameter but adds no format, default, or max detail beyond the schema, so 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?

Specific verb (List) and resource (tracked products), with an explicit field inventory: current price, buy-box seller and fulfillment, stock state, seller count, refresh interval, last read, and recent buy-box points. It also ties itself to track_product, making clear this is the read counterpart to that write tool.

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?

Provides concrete trigger phrases ('what changed on my tracked products', 'show my tracked ASINs', 'any buy-box changes') and names track_product as the setup path. It does not, however, distinguish itself from nearby siblings like watchlist_list or my_products, so exclusion guidance is missing.

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