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

The annotations already declare destructiveHint=true, but the description adds critical context by specifying that both the watch and its run history are deleted and that the action is 'Irreversible'. This goes beyond the minimal annotation, providing behavioral transparency about the extent and permanence of the operation.

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?

The description is extremely concise: two short sentences with no filler. It front-loads the core function ('Delete a watch') and includes the critical caveat ('Irreversible') in the second sentence. Every word earns its place.

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?

Given the low complexity (one parameter, no output schema) and the strong annotations, the description is nearly complete. It covers the action, scope, and irreversibility. The only minor omission is not mentioning idempotency, but that is already covered by annotations (idempotentHint=true). Overall, sufficient for correct use.

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?

The schema description covers 100% of the single parameter (id) with a clear explanation. The tool description itself does not add any extra parameter semantics, but given the high schema coverage, a baseline of 3 is appropriate. No new meaning beyond the schema is provided.

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 clearly states the action ('Delete'), the resource ('a watch'), and the additional scope ('and its run history'). This distinctly identifies the tool as the deletion operation among sibling tools like watch_create, watch_update, and watch_list, leaving no ambiguity.

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?

The description implies usage by saying 'Delete', but it does not explicitly state when to use this tool versus alternative actions like disabling a watch or seeking a soft-delete option. No exclusions or alternatives are mentioned, so the guidance is only implicit.

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