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

The annotations already declare this as a safe, read-only, idempotent, non-destructive operation, so the description is not carrying the full safety burden. The description adds useful behavioral context by saying the output is grouped by category, each operation is marked as a read or a change, and no sign-in is required.

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 front-loaded with the core purpose and stays compact at two sentences. The long group enumeration is mostly justified because it explains the catalog categories, though it is slightly redundant with the enum and is missing one enum value.

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 one-parameter catalog tool with rich annotations and no output schema, the description is nearly sufficient: it explains the catalog scope, grouping, read/change marking, and auth behavior. Its main gaps are not explaining the optional group filter and not matching the enum exactly, but these are minor for this tool type.

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 0%, so the description must compensate for the single optional enum parameter. It does list most group values, which helps explain the grouping categories, but it omits the 'fixes' group that appears in the enum and does not clarify that the group parameter is optional or acts as a filter.

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 clearly states that this tool lists every operation available through the server, organized by group. It is more specific than the title alone, but it does not explicitly distinguish itself from nearby discovery/schema tools such as api_schema or api_read.

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 description implies that this is a discovery/catalog tool and notes that it works without signing in, which helps an agent know it can be called early. However, it gives no explicit when-to-use guidance, no exclusions, and no direct comparison to sibling tools like api_schema or api_read.

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