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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, but the description adds real context beyond them: deletion is permanent, the operation is owner-scoped, and a watch belonging to another principal surfaces as notFound rather than an authorization error. That error-semantics detail is exactly the kind of behavior an agent cannot infer from the annotations.

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 destructive effect and then the scoping/error caveat and return signal. No filler or restatement of the title.

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?

Although there is no output schema, the description states that it returns confirmation of deletion, and it covers the two things an agent most needs for a destructive call: permanence and cross-principal notFound behavior. Nothing material is missing for a two-parameter delete tool.

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%, so both parameters are already documented, including that watchId comes from register_brand_audit_watch. The description reinforces the ownership semantics of watchId but says nothing about the format enum, so it neither compensates for a gap nor adds much beyond the schema baseline.

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 effect ("Permanently removes") against a specific resource ("a recurring brand-audit watch") keyed by watchId. This is clearly separable from register_brand_audit_watch and list_brand_audit_watches without opening any 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?

The description makes the usage context clear: this is the teardown counterpart for a watch previously registered via register_brand_audit_watch (referenced in the schema). It does not explicitly name alternatives such as listing watches first to obtain the watchId, nor state when not to use it, so it stops short of full routing guidance.

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