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

Annotations already disclose readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description does not need to restate these. It adds the 'retained releases' scope and 'owned site' constraint, but it does not explain what 'retained' means or whether the response is ordered or paginated. The added context is modest but not contradictory.

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?

The description is a single, front-loaded sentence with no waste. It starts with the verb, names the resource, and includes the ownership constraint efficiently.

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 simple, read-only, list operation with one parameter and no output schema, the description is largely sufficient. It covers the core purpose and constraint, but it could be more complete by clarifying what 'retained' means or how the output is structured. Given the tool's low complexity, a score of 4 is appropriate.

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%, so the description must add meaning to the 'site' parameter. It does state that the site must be owned, which is a useful semantic constraint beyond the schema's type/minLength. However, it does not specify whether the parameter is an ID, name, or other identifier, nor does it describe allowed values or format.

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 uses the specific verb 'List' and a clear resource ('retained releases for an owned site'), which distinguishes it from sibling tools like sites.list (sites) and sites.get_content (content). It is concise and unambiguous.

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?

No guidance is provided on when to use this tool versus alternatives. It does not mention any exclusions, prerequisites beyond ownership, or refer to sibling tools like sites.list for site enumeration. The description simply states the operation without contextual usage advice.

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