release_numbers

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

With no annotations, the description carries the full burden and does so excellently. It explicitly warns 'Destructive and irreversible' and discloses the confirmation requirement: 'Refuses unless confirm=True; ask the user first.' This is exactly the safety-critical behavioral disclosure an agent needs.

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 three short sentences with the most critical warning ('Destructive and irreversible') front-loaded. Every sentence adds value, and there is no repetition or filler.

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?

The description adequately covers safety and usage, but it leaves two optional parameters (account_id, token_name) unexplained and mentions nothing about return behavior or failure modes. Since those parameters are optional and the key confirmation behavior is documented, the gap is moderate rather than severe.

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 description coverage is 0%, so the description needed to compensate for the four parameters. It only addresses confirm, mentioning that the tool refuses unless confirm=True. It does not explain tpn_ids, account_id, or token_name, leaving their semantics largely undocumented.

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 verb and resource: 'Release (delete) tracking numbers.' The parenthetical 'delete' removes ambiguity, and the destructive nature distinguishes it from sibling tools like buy_numbers or configure_numbers. It doesn't explicitly name a sibling, so it misses the top score.

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 gives a clear trigger condition: 'Use this only when the user explicitly asks,' and a typical scenario: 'to clean up test numbers.' It also describes the expected flow of asking for confirmation. It doesn't explicitly mention alternatives to prefer in non-deletion cases, so it falls short of a 5.

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