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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds value beyond them: newest-first ordering, the fields returned per row, and the required auth scope (listings:read) — the latter being the kind of operational prerequisite annotations cannot express.

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?

A single sentence that front-loads the resource and follows with contents and the auth requirement — no filler. The mid-sentence inventory ('the account you act for... which account's listings, results ordered newest-first...') is slightly dense but still readable.

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 zero-parameter, read-only list with an output schema, the description covers the resource, ordering, per-item fields and the auth scope — everything needed to call it correctly. Nothing material is missing, though a one-clause pointer to the single-item sibling would make it airtight.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate; baseline 4 applies. The schema has 100% coverage and is empty, and the description correctly avoids inventing filter or paging arguments.

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 names a concrete resource ('the listings of the account you act for on MakerRadar') and enumerates what each entry carries (status, public page, management location), so an agent knows exactly what it gets back. It does not explicitly contrast itself with near-neighbours like list_current_listings or get_my_listing, so it stops short of full disambiguation.

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 phrase 'the account you act for' implies the account-scoped use case, and the token requirement signals a prerequisite. However, there is no explicit statement of when to prefer this over get_my_listing (single item) or list_current_listings (public launches), leaving the routing to inference.

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