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

With no annotations provided, the description carries the full burden of behavioral disclosure. It describes the ownership gate (security enforcement) and settlement gate (fail-closed behavior), including historical context. It also explains that on verified settlement it calls compile_and_deliver via the same code path as other entry points. This provides good insight into internal behavior, though it omits details like idempotency or side effects.

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 moderately concise—it starts with a clear one-sentence summary, then expands into necessary detail about the two gates. Some sections (e.g., the parenthetical about the security bug) are verbose but informative. It is well-structured with clear separation of concerns, though it could be trimmed without losing value.

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?

Given the tool's critical function (fulfillment and artifact delivery) and the presence of an output schema, the description covers the core behavior and constraints. However, it does not explain how to verify a quote is paid, possible error responses beyond settlement_unverified, or what the artifact consists of. The lack of parameter descriptions and postconditions makes it somewhat incomplete.

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 compensate for parameter meaning. It only implicitly mentions 'quote_id' through the ownership gate, and the 'agent_token' parameter is completely unexplained (default '' but no semantics). The description does not add meaningful parameter context beyond what the schema provides (names and types).

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 'fulfill' and the resource 'paid custom quote', with the action 'compiling and delivering its artifact'. This distinguishes it from siblings like place_order (placing an order) and price_product (pricing). The purpose is specific and unambiguous.

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 provides explicit conditions for use: the quote must be owned by the agent account and settlement must be verified. It states that without verified settlement, the tool returns 'settlement_unverified' and does not call compile_and_deliver. However, it does not compare to alternative tools or explicitly state when not to use it.

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