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

Adds substantial context beyond the annotations: it can spend the workspace balance and buy real postage, insufficient balance stops submission, staging never mails, retries must reuse the same saved quote ID, and an 'authorizing'/'needs_review' response requires reconciliation. This is exactly the financial and side-effect detail an agent needs before an irreversible spend.

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?

Front-loads the core action and gate in the first sentence, then layers constraints. It is a dense run-on paragraph where short sentences would read better, but no sentence is 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?

With an output schema present, return values need no explanation, and the description already covers spend risk, idempotency, credential requirements, and failure modes. Nothing an agent needs in order to safely invoke this destructive tool is missing.

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 must carry the load, and it does: 'confirmed=true' is explained as the approval gate, and the required 'id' is identified as the saved quote ID to reuse on retry. It does not state the ID format or where to obtain it, leaving a small gap.

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 and resource ('Release an immutable saved physical-mail quote') and characterizes the quote as saved/immutable, which cleanly separates it from the sibling quoting/getting tools (quote_product, preview_product_quote, get_product_quote). An agent can tell this is the terminal send step rather than a quoting or preview step.

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 explicit preconditions ('Requires approval of the exact artwork, addresses, options and saved total', confirmed=true) and states what is out of scope ('No funding or checkout'). It does not name a specific sibling alternative to use for quoting or previewing, so routing to the alternative is implied rather than explicit.

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