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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds substantive behavioral context the annotations cannot: what the response contains (bid counts, and supplier contact details that only appear after a supplier replies).

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?

One dense sentence with the core purpose front-loaded and the parameter behavior trailing after the semicolon. Efficient, though the nested parenthetical makes it slightly hard to parse on first read.

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, the description must describe return content, and it does (counts of recipients and responses, bids, contact info). The single optional param is also covered. A note on what an empty response or missing rfq_id looks like would close the remaining gap.

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% and the single parameter has no inline description, so the description carries the full burden. It does so adequately, explaining that rfq_id switches the call to per-RFQ response retrieval. It stops short of stating the accepted id format or that omission lists everything, but the intent is clear.

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 resource ('the user's sent RFQs') plus the aggregate payload (supplier recipient count and response count), which clearly separates it from write-oriented siblings like post_rfq. It does not, however, name or contrast against any sibling explicitly.

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?

Explains the two invocation modes: call it plain to list RFQs with counts, or pass rfq_id to drill into responses. That is real conditional guidance, though no alternative tool is named for adjacent needs.

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