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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is covered. The description adds genuinely useful context beyond that: the operation is scoped to the signed-in user's own watches and requires a Bearer API key or session token. It does not describe what happens if the watch is not found or if conflicting identifiers are supplied.

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 tight sentence with the action and scope front-loaded and the auth requirement appended as a secondary clause. 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?

For a destructive, multi-identifier mutation the description covers identity and auth but leaves gaps: no error/not-found behavior, no precedence rules among the five parameters, and no note on whether related data (price history, deals) survives removal. It is adequate but incomplete.

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 only 40%, and the description does compensate somewhat by clarifying that id and product url/id are alternative ways to identify the same watch. However, lang and marketplace remain undocumented in both places, and there is no explanation of precedence when multiple identifiers are passed.

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 gives a specific verb (Remove) and resource (one of the signed-in user's watches), plus the two identifier forms accepted. An agent can immediately distinguish this from add_watch and list_watches without reading the schema.

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?

It implies when to call it (to delete a tracked watch) and states the authentication prerequisite, but offers no explicit when-not guidance, no mention of using list_watches first to obtain an id, and no guidance on choosing between id, url, and productId.

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