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

Annotations already declare destructive=true, idempotent=false, and openWorld=false, so the safety profile is largely covered. The description adds genuinely new behavior: the target must be unarchived, an approval gate applies, and expected_name acts as an optimistic-concurrency guard that rejects stale writes. It does not describe failure modes or the two-step token flow in detail.

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 tight sentences, no filler. The destructive action and its scope are front-loaded, with the concurrency requirement following immediately.

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 destructive single-resource mutation with no output schema, the description covers the precondition (unarchived), the approval gate, the stale-write guard, and the full-replacement semantics of description. Combined with annotations carrying the safety profile, an agent has what it needs to call it correctly.

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 the baseline is 3. The description still adds meaning: expected_name is framed as a stale-change guard rather than just a current name, and 'include the full new description' clarifies that description replaces rather than appends. The confirmation_token flow is left to 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 (rename) and resource (list) with a scope qualifier (one unarchived list in the selected product), which is enough for an agent to distinguish it from create_list, get_list, or list_lists. It does not explicitly name a sibling as an alternative, so it falls short of the top tier.

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 a clear precondition – the rename must follow explicit approval – and explains the concurrency protocol (supply the current name to reject stale changes). It stops short of naming when-not-to-use cases or alternatives, so it is clear context without explicit exclusions.

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