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

Annotations already declare readOnlyHint=true, openWorldHint=true and destructiveHint=false, so safety is covered. The description adds a meaningful behavioral requirement beyond the annotations: 'Needs the user's Cotlet API key with access to this app', which is auth context the agent must know before calling.

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 resource and scope, then filters, then chaining, then auth. Slightly redundant: the first two sentences both restate 'on your account', so one could be trimmed without losing 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 read-only list tool with annotations and no output schema, the description covers scope, returned fields, filters, downstream chaining and the auth requirement. Pagination/result-limit behavior is not addressed, which is the only notable 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 description coverage is 100% with both enum parameters fully documented, so the baseline is 3. The description restates the filter values ('digital or physical', 'public, private or draft') but adds no syntax, default, or edge-case meaning beyond the schema.

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 and resource ('Lists the releases on your account') and clarifies scope with the analogy 'the same items the Bulk Edit page shows' as well as the fields returned (price, release date, visibility). It does not name a sibling tool to differentiate from, but the resource is unambiguous against bandcamp_list_sales, bandcamp_list_merch_items and bandcamp_list_track_album_codes.

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 usage context: filter by format and visibility, and explicitly routes the agent downstream with 'Use release_id from each item in the other tools.' It does not state when-not to use it or name an alternative listing tool, so it falls short of a 5.

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