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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered structurally. The description adds genuinely new behavior the annotations cannot express: the call returns an Undo, which tells the agent removal is recoverable. It does not explain retry semantics in prose, but the idempotencyKey schema description carries that.

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, no filler, with the trigger condition front-loaded before the parameter instruction and the exclusion. Every clause carries decision-relevant information.

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 two-parameter destructive tool with an output schema and full annotation coverage, the description covers trigger, exclusion, and recoverability, which is enough to call it correctly. The only gap is where setId comes from, which the agent must infer from context or prior list calls.

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%: idempotencyKey is well documented in the schema, while setId is a bare string with no description. The description says "Give its setId" but adds no format, source, or validation meaning beyond the parameter name, so it does not fully compensate for the undocumented half.

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 names a specific verb and resource (remove a set) and immediately scopes it to sets the person logged by mistake. It also names the sibling it is not (edit_set), so an agent can distinguish it without inspecting either 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?

Explicit when-to-use ("asks to remove a set they logged by mistake") plus an explicit exclusion with the correct alternative ("Do not use to change a set's numbers; use edit_set"). It also hints at the recovery path via Undo, which covers the main follow-up question an agent would have.

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