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

Goes beyond the annotations (readOnlyHint=false, openWorldHint=true) by disclosing that the answer is public and shown under the store name, that it reaches other people and needs per-call user confirmation, and that a Cotlet API key with app access is required. This is genuinely useful behavioral context for an outward-facing write.

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 stays compact, but there is mild redundancy: the public-visibility point appears twice and the confirmation directive is stated in two overlapping sentences. Every sentence still carries some signal, so only a small penalty.

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 2-parameter, fully-documented, non-destructive-but-open-world write with no output schema, the description covers visibility, recipient, confirmation behavior, and auth requirements. Nothing essential for correct invocation 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 coverage is 100%, so both parameters are already documented. The description's statements that the answer is public/under the store name and that question_id comes from list_buyer_questions repeat the schema descriptions rather than adding new meaning; 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 ('Post') and resource ('a public answer to a question on your product page') with scope ('one buyer question'). An agent can immediately distinguish this write action from the sibling read tool list_buyer_questions, which is even referenced via the question_id param.

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 clear operational guidance: confirm with the user before each call because the answer 'Reaches other people,' and notes the default-confirmation behavior can be switched off. It does not explicitly frame when-not-to-use or name an alternative, but real alternatives are minimal for this specific action.

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