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

With no annotations provided, the description carries the full behavioral burden, and it does disclose the key mutation: the item is returned to the queue and made available to another consumer. It also implies a precondition that the item must be leased and identified by receipt. It does not discuss errors, idempotency, or auth, but the central behavior is transparent.

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?

A single efficient sentence that is front-loaded with the operation and immediately states the consequence. There is no repetition of the tool name or schema fields, and every clause contributes meaning.

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 is adequate for the basic call shape and schema covers owner_key, but since there is no output schema or annotations, an agent is left without guidance on return values, error conditions, or what happens if the receipt is invalid or already consumed. These gaps keep it from being fully complete.

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 only 50% because the required receipt parameter lacks a description. The tool description helps by indicating receipt is the lease identifier, but it adds nothing about owner_key beyond the schema's own description. This is a partial compensation for the undocumented parameter.

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 uses a specific verb ('Negative-acknowledge') with a clear resource ('leased queue item') and the identifying mechanism ('by receipt'). It also explains the core effect, returning the item to the queue, which distinguishes it from positive ack and pop operations among siblings.

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 conveys clear context: use this when a leased item should be requeued for another consumer rather than permanently removed. It does not explicitly name alternatives or give when-not-to-use conditions, so it falls just 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.