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

Annotations already cover the read-only/idempotent/non-destructive profile, but the description adds genuinely new behavior: nothing is charged, and it names the two operational modes (ask vs task). It also discloses the response keys price_eur and due_at, useful context even though an output schema exists.

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?

Two tight sentences that front-load the value proposition and then the parameter contract; almost no filler. The telegraphic phrasing is dense but every clause carries real information.

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 4-parameter tool with no schema descriptions, the description covers the parameter contract well and an output schema exists to explain the return payload. Remaining gaps are minor (no defaults, no error behavior), so it is nearly complete for correct invocation.

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 0%, so the description must carry the load, and it does: it enumerates kind values ('ask'/'task'), ties answer_within_minutes to 'ask' and budget/deadline to 'task', and gives units and formats (EUR, ISO 8601). Minor gap: no mention of defaults or what happens if kind is invalid.

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+resource (getting a price) and adds the crucial qualifier 'nothing is charged', which separates it from the actual ask/rent siblings. It does not explicitly name ask_a_human or rent_a_human, but the pre-quote framing makes the purpose 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?

'Price before you ask' implies this is a prerequisite step for the human-facing siblings, and the two kind branches give invocation context. However, it never explicitly says when to use this versus ask_a_human/get_human_answer, so routing is left to inference.

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