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

With no annotations, the description carries the full burden and does disclose the two most important traits: the action is irreversible ('Cannot be undone') and requires user confirmation. It says nothing about whether associated data or history is removed, what permissions are needed, or what a successful call returns.

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 the destructive warning front-loaded after the purpose statement; nothing is wasted. It is arguably too terse for a destructive tool, but not padded.

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?

Covers purpose, irreversibility and the confirmation requirement, which is adequate for a two-parameter delete. Missing are the identifier semantics for 'id', any ownership lookup guidance, and what the call returns (no output schema exists to cover that).

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 50%, and the undocumented parameter is the critical one, 'id'. The description only implies it must identify one of the caller's own Watch records ('one of your Watches') without stating the identifier format or how to obtain it. The other parameter, user_request, is already fully explained in the schema.

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 resource ('Delete one of your Watches'), which clearly separates it from create_watches, get_watches, list_watches and update_watches in the sibling set. It doesn't explicitly name a sibling, but the delete semantics are unambiguous.

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 one real precondition ('confirm with your user first'), which is useful guidance for a destructive operation. It gives no guidance on when to delete versus when to deactivate via update_watches, or on any ownership/permission constraints.

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