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 does so well: it discloses the scoring weights, that the tool is free, that it never purchases, and the exact payment mechanism (USDC on Base eip155:8453 via x402). An agent knows the cost, side effects, and next step without external context.

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?

Dense but front-loaded: purpose first, then return values, then the execution path. Every sentence carries information, though the scoring-weight parenthetical and payment details make it slightly heavy for a single paragraph.

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 no output schema and no annotations, the description explicitly enumerates the return values (quote_id, chosen supplier, scored candidates, customer_price) and the full two-step flow. Nothing needed to invoke or sequence it correctly 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 75%, so structured fields already document most parameters. The description adds no meaning for input, category, or max_budget beyond noting the task gets classified, so the baseline 3 applies.

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 ('Get a free Agent Procurement Manager quote') and richly details the process: task classification, supplier scoring, and pricing. It is completely distinguishable from apm_categories and apm_preview by function, though it never explicitly names those siblings, so it falls just short of full sibling differentiation.

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?

Explicitly frames when to use it ('free and never executes a purchase') and when to move on, giving the exact execution path ('take the quote_id ... then call POST /task?quote=<quote_id>'). The when-to-use versus when-to-execute boundary is unambiguous.

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