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 genuinely useful context beyond that: pagination size (50 a page), ordering (newest first), the three match outcomes against the catalog, that total is the grand count, and that the response also reports the plan's room for songs and albums.

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?

Three sentences, front-loaded with the core content and no filler. It is dense but each clause adds information; the closing note on the plan's room is slightly tacked-on but still relevant.

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 usefully explains the return shape: match statuses, total, pagination and the plan-capacity figures. The main gap is that it never frames the call as a preview preceding import_catalog, but for a read-only tool whose annotations cover safety, it is largely complete.

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 100%, so the schema already documents page, artist and deezer_album_ids fully. The description only echoes the ordering and page size, adding no syntax or format detail beyond the schema. Baseline 3 is appropriate when the schema carries the load.

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 name preview_catalog_import and the description of records 'matched against the catalog: new, already in the catalog, or in conflict' together convey a dry-run of an import, but the text never states the verb 'preview' or that it is read-only inspection before importing. It reads as a description of return data rather than of the action, and does not distinguish itself from siblings like import_catalog or catalog_import_status.

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?

There is no explicit when-to-use or when-not-to-use guidance. The obvious alternative, import_catalog, is not named, and no condition is given for choosing this preview over that import or over catalog_import_status. The label-connection artist requirement is in the schema, not routed here.

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