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

Annotations already declare destructiveHint=true and readOnlyHint=false, but the description adds useful context that deletion is permanent and cannot be recovered, plus that a confirmation is returned. It does not mention authentication requirements or edge cases like a missing voucher, but it meaningfully supplements 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?

The markdown structure is clear and front-loaded, but it contains redundancy across Overview, Important Notes, and Quick Start regarding permanent deletion. Several sentences restate the same caution, so it is longer than necessary for a single-parameter delete tool.

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 simple delete operation with one documented parameter and full annotation coverage, the description is nearly complete. It tells the agent what the tool does, when to use it, and that it returns confirmation, though it could note failure behavior or prerequisites.

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 id parameter is already documented. The description adds value by specifying that the voucher ID must be provided in the URL path, which goes beyond the schema and clarifies invocation.

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 a specific verb and resource: 'Permanently remove a voucher from your system.' It distinguishes the destructive nature of the operation, but it does not explicitly contrast this tool with siblings like put_vouchers_id_status or get_vouchers_voucherid.

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 'When to Use' section gives three concrete contexts: cleanup, error correction, and inventory management. It lacks any 'when not to use' guidance or explicit alternatives, so it falls short of the top score.

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