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

Annotations already flag destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description still adds real value beyond them: the auth requirement and the partial-failure rule that an absent product "is reported and ignored" rather than erroring. It does not disclose the response shape or the 50-item cap, which keeps it off a 5.

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?

Three short sentences, front-loaded with the action and scope, then the edge-case behavior, then the prerequisite. No filler and nothing that could be trimmed without losing meaning.

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 batch-removal tool with no output schema, the description covers the action, auth prerequisite, and partial-failure semantics. Only the return payload and the 1–50 item bounds are left to the schema, which is acceptable given full 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 100%, so both required parameters are fully documented in structured form, establishing the baseline of 3. The description restates list_id and product id but adds nothing new — notably it omits the slug alternative the schema supports for item identification.

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 specific verb and resource ("Removes products from a list") and scopes it to "the signed-in shopper's account," which is what distinguishes it from the sibling remove_from_wishlist. It stops short of naming that sibling explicitly, so the differentiation is inferable 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?

"Requires sign-in" is a useful prerequisite, and "my" implies the caller's own list rather than an arbitrary shared list. However, it never states when to prefer this over remove_from_wishlist, nor what to do when the shopper is not authenticated — usage is implied rather than spelled out.

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