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

Annotations already declare idempotentHint=true and destructiveHint=true, so the safety profile is covered. The description adds genuinely new context beyond the annotations: the account requirement, the 'atlas.reveal' permission, and a plain-language restatement of the idempotent behavior ("Removing something not watched changes nothing").

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 compact sentences with no filler, each carrying distinct information (auth, action, idempotency, permission). Minor weakness: it leads with the account prerequisite before the action, so the core operation is not front-loaded.

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 simple two-parameter mutation with no output schema, the description covers auth, permission, scope, and idempotency behavior adequately. Only the success/failure response shape is left unaddressed, which is minor here.

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% and the enum is fully specified, so the baseline is a 3. The description adds value by telling the agent where valid values come from ("as list_watches shows them"), which helps ensure correct invocation beyond the raw field types.

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 ("Removes") and resource ("one item from your workspace's 'AI watches'"), making the operation unambiguous. It clearly contrasts with the watch sibling, and the entity_type/id scoping ties it to a single tracked item.

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?

Gives clear context: it references list_watches as the source of the arguments and explains that removing a non-watched item is a no-op. It stops short of an explicit "use watch to add items" routing statement, so it lacks full when/when-not alternative framing.

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